Four detainees have escaped from a federal immigration detention center in New Jersey, which has been the center of protests since its opening in May and where both a sitting congresswoman and Newark’s mayor have been arrested.

A small crowd of people gathered outside Delaney Hall in Newark, N.J. to demonstrate over allegations of poor conditions.

Four men escaped from an ICE detention center in Newark, New Jersey, after dozens of migrant detainees reportedly staged a revolt on Thursday.