Armed agents in tactical gear threw flash-bang grenades to disperse a crowd in Los Angeles’s Fashion District. Later, agents fired less-than-lethal ammunition at protesters outside a detention center.

A local immigrant rights organization said more than 45 people were detained in the operations, which were described as “random sweeps.”

Federal immigration authorities carried out enforcement activities at several locations in Los Angeles on Friday, with some clashes breaking out as crowds gathered outside a warehouse and other locations across the city to protest the activity.