Multiple people were detained by U.S. Immigration and Customs Enforcement agents in downtown San Francisco on Tuesday morning, merely 12 hours after thousands of protesters took to the streets in the Mission to rally against the widespread raids taking place across California.

ICE agents arrested at least two people outside San Francisco court on Tuesday, bringing crowds out to the courtroom and shutting it down.

Mayor Daniel Lurie, who won on a promise to get tough on crime, is being put to the test in the liberal city—where late-night unrest marred largely peaceful protests.