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.

Authorities are looking for four detainees who escaped from an immigration detention facility in Newark, New Jersey.

Sandoval-Lopez and three others — Joan Sebastian Castaneda-Lozada, Franklin Norberto Bautista-Reyes and Andres Pineda-Mogollon — escaped Delaney Hall Detention Facility in Newark on Thursday following a violent uprising inside the center.