A DHS spokesperson told CNN the lawmakers could be arrested, saying the department has “body camera footage of some of these members of Congress assaulting our ICE enforcement officers, including body slamming a female ICE officer.

Ras Baraka, the Democratic mayor of Newark, New Jersey, was arrested on Friday while joining members of Congress at an Immigration and Customs Enforcement detention center, according to interim U.S. Attorney for the District of New Jersey Alina Habba.

An immigration detention center in New Jersey is at the center of tensions between three congressional Democrats and the Trump administration after the arrest of Newark’s mayor set off a scrum outside the complex.