Guards at a New Jersey immigrant detention center are retaliating against detainees for nonviolent protests over poor conditions, including a hunger and labor strike, according to relatives and members of Congress.

Staff at U.S. Immigration and Customs Enforcement’s Delaney Hall Detention Facility — a Newark immigration jail operated by the private prison giant GEO Group — took steps to crack down on the strikes, including attacking immigration detainees with pepper spray and batons, transferring protest leaders to other facilities, and shutting down family visitation, advocates and relatives of detainees told The Intercept.

“Detainees told me about scalding hot showers that have led to burns and blisters; worms in food; and being denied medical care.”

One woman who spoke with her nephew inside Delaney Hall told The Intercept that she was told negotiations were set to take place between guards and striking inmates — but instead, her nephew reported, guards attacked the detainees with pepper spray.

“My nephew can’t see right now because he was hit on the head with a baton,” said the woman, who requested anonymity for fear of further retaliation against her nephew. “Prison operators told my nephew and the others on the hunger strike that ICE was going to negotiate on Thursday. They got hit instead.”