The Michigan rap group Insane Clown Posse filed suit on Wednesday against the Justice Department and the Federal Bureau of Investigation, saying that the United States government had made the “unwarranted and unlawful decision” to classify fans of the band as criminal gang members, leading to their harassment by law enforcement and causing them “significant harm.”

The lawsuit was filed in Federal District Court in Detroit by lawyers for the band and for the American Civil Liberties Union of Michigan. Plaintiffs include the Insane Clown Posse founders Joseph Bruce and Joseph Utsler, who perform as Violent J and Shaggy 2 Dope, and whose fans call themselves Juggalos.

Also listed as plaintiffs are four Juggalos from Nevada, California, North Carolina and Iowa, who offered details of incidents in which they said they had been subjected to police harassment or other punishments for identifying with Insane Clown Posse.

Brandon Bradley, from Citrus Heights, Calif., and one of the plaintiffs in the lawsuit, said at a news conference in Detroit on Wednesday that he had been stopped and questioned by police on several occasions because he wore Juggalo tattoos and clothing. He said that after a lifetime of feeling like an outsider, the music of Insane Clown Posse “told me I wasn’t alone.”