Mr. Justice Douglas
delivered the opinion of the-Court.
This is a civil rights action,1 42 U. S. C. §§ 1983, 1985, attacking the constitutionality of certain Texas statutes, brought by appellees. It alleges that the defendants, members of the Texas Rangers and the Starr County, Texas, Sheriff’s Department, and a Justice of the Peace in Starr* County, conspired to deprive appellees of their rights under the First and Fourteenth Amendments, by unlawfully arresting, detaining, and confining them without due process and without legal justification, and by unlawfully threatening, harassing, coercing, and physically assaulting them to prevent their exercise of the rights of free speech and assembly. A three-judge court was convened which declared five Texas statutes unconstitutional and; enjoined their enforcement. 347 F. Supp. 605, 634. In addition, the court permanently enjoined the defendants from a variety of unlawful practices which formed the core of the alleged conspiracy. ■Five defendants, all members of the Texas Rangers, have perfected this appeal. 28 U. S. C. § 1253. The appellees [805]*805consist of the United Farm Workers Organizing Committee, certain named plaintiffs,2 and the class they represented in the District Court on whose behalf the judgment was also rendered.3
From June 1966 until June 1967, the appellees were engaged in an effort to organize into the union the predominantly Mexican-American farmworkers of the lower Rio Grande Valley. This effort led to considerable local controversy which brought appellees into conflict with the state and local authorities, and the District Court found that as a result of the unlawful practices enjoined below the organizing efforts were crushed. This lawsuit followed.
The factual findings of the District Court are not challenged here. In early June 1966, at the beginning of the organizing effort, Eugene Nelson, one of the strikers’ principal leaders, stationed himself at the International Bridge in Roma, Texas, attempting, to persuade laborers from Mexico to support the strike. He was taken into custody by the Starr County Sheriff, detained for four hours, questioned about the strike, and was told he was under investigation by the Federal Bureau of [806]*806Investigation. No charges were ever filed against him. 347 F. Supp., at 612.
In October 1966, about 25 union members and sympathizers picketed alongside the Rancho Grande Farms exhorting the laborers to join the strike; they were-ordered to disperse by' the sheriffs although their picketing was .peaceful. When Raymond Chandler, one of the union- leaders, engaged an officer in conversation contesting the validity of the order, he was arrested under Art. 474 of the Texas Penal Code for breach of the peace. Although the maximum punishment for this offense is a-$200 fine, bond was set for Chandler at $500. When two of Chandler’s friends came to the courthouse to make bond, they were verbally abused, told they had no business there, and that if they did not leave they would be placed in jail themselves. 347 F. Supp., at 612-613. They left.4
Later that month, when the president of the local union and others were in • the courthouse under arrest, they shouted “viva la huelga” in support of the strike. A deputy sheriff struck the union official and held a gun at his forehead, ordering him not to repeat those words in the courthouse' because it was a “respectful place.” Id., at 613. As the strike continued through the year and the Texas Rangers were called into the local area, there, were more serious incidents of violénce.. In May 1967 some union pickets gathered in Mission, Texas, to protest the carrying of produce from the valley on the Missouri-Pacific Railroad. They were initially charged with trespass on private property; this was changed to unlawful assembly, and finally was supferseded by complaints of secondary, picketing. The Reverend Edgar' [807]*807Krueger.and Magdaleno Dimas were taken into custody by the Rangers. As a train passed, the Rangers held these two prisoners’ bodies so that their faces were only .inches from the train. Id., at 615.
A few weeks later the Rangers sought to arrest Dimas for allegedly brandishing a gun in a threatening manner, and found him by “tailing” Chandler and Moreno, also union members. Chandler was arrested with no expía-' nation as was Moreno, who was also assaulted by Captain Allee at the time. These two men were later charged with assisting Dimas to evade arrest, although by, Allee’s own testimony they were never told Dimas was sought by the Rangers. Indeed, because the officers had no-arrest warrant or formal complaint against Dimas, they could not then arrest him, so they put'in a call to a justice of the peace who arrived on the scene and filled out a warrant on forms he carried with him. The Rangers then broke into a house and arrested Dimas and Rodriguez, another union member, in a violent and brutal fashion. Dimas was hospitalized four days with a brain concussion, and X-rays revealed that he had been struck so hard on the back that his spine was curved out of shape. Rodriguez had cuts and bruises on his ear, elbow, upper arm, back, and jaw; one of his fingers was broken and the nail torn off. Id., at 616-617.
Earlier, in May, Nelson had gone down to the Sheriff’s office, according to appellees, to complain that the Rangers were acting as a priváte police force for one of the farms in the area. The three-judge District Court found that Nelson was then arrested and charged with threatening the life of certain Texas Rangers, despite the fact that Captain Allee conceded there was no serious threat. Allee had directed that the charges be filed to protect the Rangers from censure if something happened to Nelson. Id., at 615.
[808]*808During this entire period the Starr County Sheriff’s office regularly distributed an aggressive anti-union newspaper. A deputy driving an official car would pick up the papers' each week and bring them back to the Sheriff’s office; they would then be distributed by various deputies. Id,, at 617. The District Court included copies of the paper in an appendix to its opinion; a typical headline was. “Only Mexican Subversive Group Could Sympathize with Valley Farm Workers.” The views of the Texas Rangers were similarly explicit. On a number of occasions they offered farm jobs to.the union leaders, at the union demand wage, in return for, an end to the strike'. Id., at 613, 614. The Rangers told one union member that they had been called into the area to break the strike and would not leave until they had done so. Id., at 613.
AmPng other findings of the three-judge District Court were that the defendants selectively enforced the unlawful assembly law, Art. 439 of the Texas Penal Code, treating as criminal an inoffensive union gathering, 347 F. Supp., at 613; solicited'criminal, complaints against appellees from persons with no knowledge of the alleged Offense, id., at 615; and filed baseless. charges against one appellee for impersonating an officer.5
The' three-judge District Court found , that the law enforcement officials “took sides in what was essentially a labor-management controversy.”
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Mr. Justice Douglas
delivered the opinion of the-Court.
This is a civil rights action,1 42 U. S. C. §§ 1983, 1985, attacking the constitutionality of certain Texas statutes, brought by appellees. It alleges that the defendants, members of the Texas Rangers and the Starr County, Texas, Sheriff’s Department, and a Justice of the Peace in Starr* County, conspired to deprive appellees of their rights under the First and Fourteenth Amendments, by unlawfully arresting, detaining, and confining them without due process and without legal justification, and by unlawfully threatening, harassing, coercing, and physically assaulting them to prevent their exercise of the rights of free speech and assembly. A three-judge court was convened which declared five Texas statutes unconstitutional and; enjoined their enforcement. 347 F. Supp. 605, 634. In addition, the court permanently enjoined the defendants from a variety of unlawful practices which formed the core of the alleged conspiracy. ■Five defendants, all members of the Texas Rangers, have perfected this appeal. 28 U. S. C. § 1253. The appellees [805]*805consist of the United Farm Workers Organizing Committee, certain named plaintiffs,2 and the class they represented in the District Court on whose behalf the judgment was also rendered.3
From June 1966 until June 1967, the appellees were engaged in an effort to organize into the union the predominantly Mexican-American farmworkers of the lower Rio Grande Valley. This effort led to considerable local controversy which brought appellees into conflict with the state and local authorities, and the District Court found that as a result of the unlawful practices enjoined below the organizing efforts were crushed. This lawsuit followed.
The factual findings of the District Court are not challenged here. In early June 1966, at the beginning of the organizing effort, Eugene Nelson, one of the strikers’ principal leaders, stationed himself at the International Bridge in Roma, Texas, attempting, to persuade laborers from Mexico to support the strike. He was taken into custody by the Starr County Sheriff, detained for four hours, questioned about the strike, and was told he was under investigation by the Federal Bureau of [806]*806Investigation. No charges were ever filed against him. 347 F. Supp., at 612.
In October 1966, about 25 union members and sympathizers picketed alongside the Rancho Grande Farms exhorting the laborers to join the strike; they were-ordered to disperse by' the sheriffs although their picketing was .peaceful. When Raymond Chandler, one of the union- leaders, engaged an officer in conversation contesting the validity of the order, he was arrested under Art. 474 of the Texas Penal Code for breach of the peace. Although the maximum punishment for this offense is a-$200 fine, bond was set for Chandler at $500. When two of Chandler’s friends came to the courthouse to make bond, they were verbally abused, told they had no business there, and that if they did not leave they would be placed in jail themselves. 347 F. Supp., at 612-613. They left.4
Later that month, when the president of the local union and others were in • the courthouse under arrest, they shouted “viva la huelga” in support of the strike. A deputy sheriff struck the union official and held a gun at his forehead, ordering him not to repeat those words in the courthouse' because it was a “respectful place.” Id., at 613. As the strike continued through the year and the Texas Rangers were called into the local area, there, were more serious incidents of violénce.. In May 1967 some union pickets gathered in Mission, Texas, to protest the carrying of produce from the valley on the Missouri-Pacific Railroad. They were initially charged with trespass on private property; this was changed to unlawful assembly, and finally was supferseded by complaints of secondary, picketing. The Reverend Edgar' [807]*807Krueger.and Magdaleno Dimas were taken into custody by the Rangers. As a train passed, the Rangers held these two prisoners’ bodies so that their faces were only .inches from the train. Id., at 615.
A few weeks later the Rangers sought to arrest Dimas for allegedly brandishing a gun in a threatening manner, and found him by “tailing” Chandler and Moreno, also union members. Chandler was arrested with no expía-' nation as was Moreno, who was also assaulted by Captain Allee at the time. These two men were later charged with assisting Dimas to evade arrest, although by, Allee’s own testimony they were never told Dimas was sought by the Rangers. Indeed, because the officers had no-arrest warrant or formal complaint against Dimas, they could not then arrest him, so they put'in a call to a justice of the peace who arrived on the scene and filled out a warrant on forms he carried with him. The Rangers then broke into a house and arrested Dimas and Rodriguez, another union member, in a violent and brutal fashion. Dimas was hospitalized four days with a brain concussion, and X-rays revealed that he had been struck so hard on the back that his spine was curved out of shape. Rodriguez had cuts and bruises on his ear, elbow, upper arm, back, and jaw; one of his fingers was broken and the nail torn off. Id., at 616-617.
Earlier, in May, Nelson had gone down to the Sheriff’s office, according to appellees, to complain that the Rangers were acting as a priváte police force for one of the farms in the area. The three-judge District Court found that Nelson was then arrested and charged with threatening the life of certain Texas Rangers, despite the fact that Captain Allee conceded there was no serious threat. Allee had directed that the charges be filed to protect the Rangers from censure if something happened to Nelson. Id., at 615.
[808]*808During this entire period the Starr County Sheriff’s office regularly distributed an aggressive anti-union newspaper. A deputy driving an official car would pick up the papers' each week and bring them back to the Sheriff’s office; they would then be distributed by various deputies. Id,, at 617. The District Court included copies of the paper in an appendix to its opinion; a typical headline was. “Only Mexican Subversive Group Could Sympathize with Valley Farm Workers.” The views of the Texas Rangers were similarly explicit. On a number of occasions they offered farm jobs to.the union leaders, at the union demand wage, in return for, an end to the strike'. Id., at 613, 614. The Rangers told one union member that they had been called into the area to break the strike and would not leave until they had done so. Id., at 613.
AmPng other findings of the three-judge District Court were that the defendants selectively enforced the unlawful assembly law, Art. 439 of the Texas Penal Code, treating as criminal an inoffensive union gathering, 347 F. Supp., at 613; solicited'criminal, complaints against appellees from persons with no knowledge of the alleged Offense, id., at 615; and filed baseless. charges against one appellee for impersonating an officer.5
The' three-judge District Court found , that the law enforcement officials “took sides in what was essentially a labor-management controversy.” Id., at 618. Although there was .virtually no evidence of assault upon [809]*809anyone by union people during the strike, the officials “concluded that the maintenance of law and order was inextricably bound to preventing the success of the strike.” Ibid. Thus, these were not a series of isolated incidents but a prevailing pattern throughout the controversy.
I
It is argued that a state injunction 6 against the appellees, issued on July 11, 1967, ended the strike and thus rendered- the controversy moot. That is not the case.
After summarizing the defendants’ unlawful practices, the District Court concluded that “[t]he union’s efforts collapsed under this pressure in June of 1967 and this suit was filed in an effort to seek relief.” Ibid. Thus it was the defendants’ conduct, which is the subject of this suit, that ended the strike, not the state court injunction, which came afterward. With the protection of the federal court decree, appellees could again begin their efforts.
Moreover, the state court injunction is quite limited. It proscribes picketing by the appellees and those acting in concert with them only on or near property owned by La Casita Farms, Inc.,' the plaintiff in the state case. But the appellants agreed at oral argument that La Casita is only one of the major employers in the area, and some of the incidents involved occurred at other locations. Moreover the state court injunction was only, temporary, and on appeal the Texas Court of- Civil Appeals, after finding that most of the trial court findings were unsupported, affirmed 'only because of the limited nature of review, under Texas law, of a temporary injunction. The appellate court concluded that “nothing in this [810]*810opinion is to be taken as a ruling that the evidence before us would support the issuance of a permanent injunction . ...” United Farm Workers Organizing Comm. v. La Casita Farms, Inc., 439 S. W. 2d 398, 403. We were advised at oral argument that no permanent injunction against picketing has ever been issued, and we cannot assume that one will be.
Nor can it be argued that the case has become moot because appellees have abandoned their efforts as a result of the very-harassment they sought to restrain by this suit. There can be no requirement that appellees continue to subject themselves to physical violence and unlawful restrictions upon their liberties throughout the pendency of the action in order to preserve it as a live controversy. In the face of appellants’ conduct, appel-' lees sought to vindicate their rights in the federal court. In June 1967 they rechannelgd- their efforts from direct attempts at unionizing the workers to seeking 'the protection of a federal decree, and hence they brought this suit.. In their amended complaint, filed in October' 1967, they charged that the defendants’ conduct, aimed at all those who make common cause with appellees, “chill[ed] the willingness of people to exércise their First Amendment rights,” resulting, ás the three-judge District Court found, in the “collapse” of the union drive. Appellees continued to prosecute the suit and won a judgment in December 1972. We may not assume that because during this period they directed their efforts to the judicial battle, they have abandoned their principal cause. Rather, the very purpose of the suit was to seek protection of the federal court so that the efforts at unionization could be renewed. It is settled that an action for an injunction does not become moot merely because the conduct complained of has terminated, if there is a póssibility of recurrence, since otherwise the [811]*811defendants “would be free to return . to ‘ [their] old ways.’Gray v. Sanders, 372. U. S. 368, 376; Walling v. Helmerich & Payne, Inc., 323 U. S. 37, 43; United States v. W. T. Grant Co., 345 U. S. 629, 632; NLRB v. Raytheon Co., 398 U. S. 25, 27; SEC v. Medical Committee for Human Rights, 404 U. S. 403, 406. The appellee union remains very much a' live organization and its goal continues to be the unionization of farmworkers. The essential controversy is therefore not moot, but very much alive.
II
We first consider the provisions of the federal court decree enjoining police intimidation of the appellees.7 [812]*812This part of the decree complements the other relief, in that it places boundaries on all police conduct, not just that which is based upon state statutes struck down by the federal court. The complaint charged that the enjoined conduct was but one part of a single plan by the defendants, and the District Court found a pervasive pattern of intimidation in which the law enforcement authorities sought to suppress appellees' constitutional rights. In this blunderbuss effort the police not only relied on statutes the District Court found constitutionally deficient, but concurrently exercised their authority under valid laws in an unconstitutional manner. While it is argued that a three-judge District Court could not properly be convened if police harassment under concededly constitutional statutes were the only question presented to it, it could properly consider the question and grant relief in the exercise of jurisdiction ancillary to that conferred by the constitutional attack on the state statutes which plainly required a three-judge court.8
[813]*813That part of the decree in question here prohibits appellants from using their authority as peace officers to arrest, stop, disperse, or imprison appellees, or otherwise interfere with their organizational efforts, without [814]*814“adequate cause.” “Adequate cause” is defined as (1) actual obstruction of public or private passways causing unreasonable interference,' (2) force or violence, or threat thereof, actually committed by any person, or the aiding and abetting of such conduct, or, (3) probable cause to" bélieve in good faith that a criminal law of the State of Texas has been violated, other than the ones struck down in the remainder of the decree. On its face the injunction does no more than require the police to abide by constitutional requirements; and there is no contention that this decree would interfere with' law enforcement by- restraining the police from engaging in conduct that would be otherwise lawful.
Thus the only question before us is whether this was an appropriate exercise of the federal court’s equitable powers. We first note that this portion of the decree creates no interference with prosecutions pending in the state courts, so that the special considerations relevant to cases like Younger v. Harris, 401 U. S. 37, do not apply here. Nor. w;as there any requirement that appellees first exhaust state remedies before bringing their federal claims under the Civil Rights-Act of 1871 to federal court. McNeese v. Board of Education, 373 U. S. 668; Monroe v, Pape, 365 U. S. 167. Nonetheless there remains the necessity of showing, irreparable injury, “the traditional prerequisite to obtaining an injunction” in any case. Younger, supra, at 46.
Such a showing was clearly made here as the unchallenged findings of the. District Court show. The .appellees sought to. do no more than organize a lawful union to better the situation of one of the most economically oppressed classes of workers in the country. Because of the intimidation by state authorities, their lawful effort was crushed. The workers, aAd their leaders and organizers were placed in fear of exercising their [815]*815constitutionally protected rights of free, expression, assembly, and association. Potential supporters of their cause were placed in fear of lending their support.. If they were to be able to regain those rights and continue furthering their cause by constitutional means, they required protection from appellants’ concerted conduct. .No remedy at law would be adequate to provide such protection. Dombrowski v. Pfister, 380 U. S. 479, 485-489.
Isolated incidents of. police misconduct under valid statutes would not, of course, be cause for the exércise of a federal court’s equitable powers. But “[w]e have not hesitated on direct review to strike down applications of constitutional statutes which we have found to be unconstitutionally applied.” Cameron v. Johnson, 390 U. S. 611, 620, citing Cox v. Louisiana, 379 U. S. 559; Wright v. Georgia, 373 U. S. 284; Edwards v. South Carolina, 372 U. S. 229. Where, as here, there is .a persistent pattern of police misconduct, injunctive relief is appropriate. In Hague, v. Committee for Industrial Organization, 307 U. S. 496, we affirmed the granting of such relief under strikingly similar facts. There also law enforcement officials set out to crush a nascent labor union. The police interfered with the lawful distributiofl of pamphlets, prevented the holding of public meetings, and ran some labor organizers out of town. The District Court declared some of the municipal ordinances unconstitutional. In addition, it enjoined the police from “exercising personal restraint over [the plaintiffs] without warrant or confining them without lawful .arrest and production of them' for prompt judicial hearing ... or interfering with their free access to the streets, parks, or public places of the city,” or from “interfering with the right of the [plaintiffs],.their agents and those acting with them, to communicate their views as individuals [816]*816to others on the streets in an. orderly and peaceable manner.” Id., at 517. The. lower federal courts have also granted such relief in similar eases.9
For reasons to be stated, that portion of this relief based on holdings that certain state statutes are- unconstitutional should be modified. In all other respects this portion of the. District Court decree was quite proper.10
Ill
Finally, we consider the portion of the District-Court's judgment declaring five Texas statutes unconstitutional, with the accompanying injunctive relief. We have been pressed with arguments by the appellants that these parts of the decree are inconsistent with the teachings of Younger v. Harris, 401 U. S. 37, and Samuels v. Mackell, 401 U. S. 66. For reasons explained below, it is unnecessary to reach these' contentions at present. ■
Younger and its companion cases are grounded upon the special considerations which apply when a federal [817]*817court is asked to intervene in pending state criminal prosecutions. Steffel v. Thompson, 415 U. S. 452. Although both parties here have assumed the relevance of Younger, we have been unable to find any precise indication in the District Court opinion or in the record that there were pending prosecutions at the time of the District Court decision. Indeed, the chronology of events gives rise to the contrary inference.- Although the District Court issued its opinion in December 1972, the union effort which was the' source of this contest had been interrupted more than five years earlier. It seems likely that any state prosecutions initiated during the effort would have been concluded by that time unless they had been restrained by a temporary order of the federal court. But there is no indication that such an order was ever issued. Moreover, the injunctive relief granted does not appear to be directed at restraining any state court proceedings.11
[818]*818If in fact there were no pending prosecutions, the relief could have impact only on future events in which the challenged statutes might be invoked by the appellants. Since this remains a live, continuing controversy, such relief would ordinarily be appropriate if justified by the merits of the case. Gray v. Sanders, 372 U. S. 368, 376. But here we have a special situation, for three of the statutes in question have since been repealed by the Texas Legislature. Article 474 of the Penal Code, the breach-of-the-peace provision, has been replaced .by §§42.01, 42.03, and 42.05 in the new codification; Art. 482, the abusive-language statute, has been replaced by § 42.01; and Art. 439, the unlawful-assembly provision, has been replaced by § 42.02., These new enactments, which replaced the earlier statutes as .of January 1, 1974, are more narrowly drawn than their predecessors. Whatever the merits of the District Court’s conclusions on the earlier statutes, any challenge to the new provisions presents a different case.
Thus, although there was a live controversy as to these statutes, at the time of the District Court decree, if there are no pending prosecutions under the old statutes, the portions of the District Court’s judgment relating to. them has become moot.12 But because we cannot determine with certainty 'whether there are pending prosecutions, or even whether the District Court intended to enjoin them if there “were, the proper disposition is to remand the case to the District Court for further' find[819]*819ings. Cf. Diffenderfer v. Central Baptist Church, 404 U. S. 412. If there are no pending prosecutions under these superseded statutes, the ■ District Court should vacate both the declaratory and injunctive relief as to them. If there are pending prosecutions remaining against any of the appellees,13 then the District Court should make findings as to. whether these particular prosecutions were brought in bad faith; with no genuine expectation of conviction.14 If it so finds, the court will. [820]*820enter an appropriate decree which this Court may ultimately review, both as to the propriety of federal court intervention in the circumstances of the case, and as to the merits of any holding striking down the state statutes.
As to the two remaining statutes, Tex. Civ. Stat., Arts. 5154d and 5154f, it is not necessary for other reasons for us at this time to reach any Younger questions or the merits of the decision below as to the statutes’ constitutionality. As to these also we must remand for a determination as to whether there are pending prosecutions, although if there are none the appellees might still be threatened with prosecutions in the future since these statutes are still in force. But if there are only threatened prosecutions, and the appellees sought only declaratory relief as to the statutes, then the case would not be governed by Younger at all, but by Steffel v. Thompson, 415 U. S. 452, decided this Term.15 The District Court, of course, did not have the benefit of our opinion in Steffel at the time of its decision. We therefore think it appropriate to vacate the judgment of the District Court as to these statutes and remand for further findings and reconsideration in light of Steffel v. Thompson. If there are pending prosecutions then the District Court should determine whether they were brought in bad faith, for the purpose of harassing appellees and deterring the exercise of First Amendment rights, so that allowing the prosecutions to proceed will result in irreparable injury to the appellees. If there are no pending prosecutions and only declaratory relief is sought, then Steffel clearly controls and no Younger showing need be made.
[821]*821In summary, we affirm the decree granting injunctive relief against police misconduct, with appropriate modifications to delete reference to the five statutes held unconstitutional by the District Court. We vacate the District Court’s judgment as to those five statutes, and remand for further proceedings consistent with this opinion.
It is so ordered.
Mr. Justice Powell took no part in the decision, of this casé.