JACKSON (AP) — Federal prosecutors said Thursday that alleged members of white supremacist prison gangs in Mississippi and Oklahoma have been arrested on racketeering charges tied to violent crimes and drug distribution.

The Justice Department said in a news release that 13 of the 14 people indicted in Mississippi and all 11 indicted in Oklahoma are in custody.

Prosecutors said those indicted are believed to be members of Aryan Brotherhood Mississippi, or members or associates of Universal Aryan Brotherhood of Oklahoma — whites-only gangs that use Nazi symbols and have crime operations inside and outside prisons.

“The Aryan Brotherhood is a violent gang that has seeped from behind prison walls into communities throughout this nation,” said Assistant Attorney General Leslie R. Caldwell said in the news release.

The 10-count Mississippi indictment was handed down Oct. 23 and unsealed Thursday. The four-count Oklahoma indictment was handed down Nov. 5 and unsealed Nov. 10.

The Mississippi indictment said the gang has carried out killings, assaults, kidnappings, money laundering and distribution of illegal drugs such as methamphetamine. The document described an organizational structure that includes officers inside and outside prison.

The Oklahoma indictment said five alleged gang members kidnapped and maimed another member who did not supply and distribute drugs. A news release said: “Following a direct order, the defendants held down a UAB member and placed a heated knife on his neck to burn off the UAB patch-tattoo.”