Newark Mayor Ras Baraka was arrested Friday at a federal immigration detention center where he has been protesting its opening this week and held in custody for several hours.

Baraka was released shortly after 8 p.m. and, after stepping out of an SUV with flashing emergency lights, told waiting supporters: “The reality is this: I didn’t do anything wrong.”

Baraka said he could not speak about his case, citing a promise he made to lawyers and the judge. But he voiced full-throated support for everyone living in his community, immigrants included.

“All of us here, every last one of us, I don’t care what background you come from, what