National Guard troops in Los Angeles have already detained protesters boycotting operations by U.S. Immigration and Customs Enforcement (ICE), though they were quickly turned over to local law enforcement, according to officials.

Maj. Gen. Scott Sherman told the Associated Press on Wednesday that about 500 National Guard Troops have been trained so far to help agents carry out immigration operations.

Immigration officials have already circulated photos of soldiers from the National Guard providing security for Department of Homeland Security agents.

A protester throws a rock near the 101 Freeway during anti-ICE clashes Sunday in Los Angeles. (Jim Vondruska/Getty Images)

California Gov. Gavin Newsom has had a public war of words with Trump administration officials, accusing the president of having “commandeered” 2,000 of the state’s National Guard members “illegally, for no reason” without consulting with California’s law enforcement leaders.

The Trump administration, meanwhile, said its ICE operations are aiming to get “criminal illegal immigrant killers, rapists, gangbangers, drug dealers, human traffickers and domestic abusers off the streets.”

Fox News Digital’s Danielle Wallace and the Associated Press contributed to this report.