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.

Shortly after they began guarding a Los Angeles federal building Friday, U.S. Marines detained a man who had walked onto the property and did not immediately hear their commands to stop.

Infantry Marines arrived in LA with minimal training to counter civilians protesting the Trump administration's immigration crackdown.

Marines temporarily detained a civilian protester in Los Angeles as authorities prepare for No Kings nationwide protests against the Trump administration Saturday.

"I would like to emphasize that the soldiers will not participate in law enforcement activities," the task force leader told reporters.

California Gov. Gavin Newsom had a brief victory in his lawsuit against President Trump, but an appeals court quickly blocked a federal judge's order.

Marines appeared to make their first detention of a person in LA, after President Trump deployed them to the city to protect federal buildings and ICE agents. Military officials said the marines can temporarily detain individuals and pass them on to civilian law enforcement.