Police have arrested at least 30 people for assaulting law enforcement and other felony offenses outside Immigration and Customs Enforcement’s Delaney Hall immigrant detention facility in Newark, New Jersey, since Memorial Day.

A number of those arrested traveled from out-of-state, including Colorado, Connecticut, and Washington, to take part in the demonstration, which began on Sunday, May 24, as Democratic lawmakers gathered outside and demanded to tour the facility on the basis that detainees had allegedly poor conditions and substandard meals.