Protests live updates: Marines make 1st temporary detention in LA

Following news of the Marines deployment, LAPD Chief Jim McDonnell said the "arrival of federal military forces in Los Angeles -- absent clear coordination -- presents a significant logistical and operational challenge for those of us charged with safeguarding this city."

"The Los Angeles Police Department, alongside our mutual aid partners, has decades of experience managing large-scale public demonstrations, and we remain confident in our ability to do so professionally and effectively. That said, our top priority is the safety of both the public and the officers on the ground," McDonnell said.

He urged "open and continuous lines of communication between all agencies to prevent confusion, avoid escalation, and ensure a coordinated, lawful, and orderly response during this critical time."

Nearly 70 people were arrested over the weekend during protests in Los Angeles County, according to the latest figures from police.

They included 29 people arrested on Saturday for failure to disperse and 21 people arrested on Sunday with charges ranging from attempted murder with a Molotov cocktail to looting to failure to disperse, the LAPD said.

California Highway Patrol said it arrested 19 people on Sunday.

The Los Angeles Police Department announced on Monday that the city is going on "Tactical Alert."

"The City of Los Angeles has declared a Tactical Alert," the LAPD wrote on X. "All uniformed personnel are to remain on duty."

The term signifies a heightened level of response and preparedness where officers can be kept on past their shift end time and moved around between divisions.

This type of response is often deployed when major events occur in the city, which require significant resources.

California union leader David Huerta, who has been charged with conspiring to impede an officer during a demonstration over President Donald Trump's immigration crackdown, was released Monday from federal custody on $50,000 bond.

Huerta is the president of Service Employees International Union California, which represents thousands of janitors, security officers and other workers. The union said he was arrested on Friday while observing and documenting law enforcement activity at an ICE raid in Los Angeles.

His arrest has become a rallying cry for union members nationwide and Democratic politicians who had called for his release. The SEIU held a large rally in downtown Los Angeles earlier Monday in support of Huerta. Demonstrations were also planned in at least a dozen cities, from Boston to Denver.