Amid a storm of protest and arrests in downtown Los Angeles, immigration authorities appear to be intensifying operations across Southern California as federal officials vow to press ahead with a crackdown on workers and residents without proper documents.

6:30 p.m.: More than 100 people gathered at the immigration services building and detention center in downtown Los Angeles to protest the raids. DHS officers fired pepper balls at the protesters before the Los Angeles Police Department dispersed the crowd.

Dozens of mayors from across the Los Angeles region banded together to demand that the Trump administration stop the stepped-up immigration raids that have spread fear across their cities and sparked protests across the U.