The Trump administration is deploying the California National Guard in response to protests in Los Angeles that begin Friday evening over immigration enforcement operations that have resulted in some clashes between demonstrators and authorities,

President Donald Trump signed a memo late Saturday night federalizing 2,000 California National Guard troops to address what a White House official called the “lawlessness that has been allowed to fester” in Los Angeles.

Some protesters hurled large chunks of broken concrete at officers, slashed tires and defaced buildings, according to the U.S. Department of Homeland Security. Police declared an unlawful assembly and responded by firing tear gas,