The LAPD said on social media that the people in the crowd were throwing "rocks, bricks, bottles and other objects" while they were near the federal building.

Opponents of President Donald Trump’s administration are set to rally in nearly 2,000 cities and towns this weekend.

In Los Angeles, 38 people were arrested downtown on Saturday night, police said Sunday. In Huntington Beach, police arrested a convicted felon they said had a loaded handgun.

The largely peaceful protests during the "No Kings Day" demonstration in downtown Los Angeles took an intense turn in the afternoon. Police ordered the crowd to disperse at about 4:15 p.m. PDT near Alameda Street and Temple Avenue, according to the Los Angeles Police Department's Central Division.

No Kings” demonstrations marched in hundreds of cities on Saturday to protest what organizers describe as President Donald Trump’s authoritarian agenda, including recent immigration raids that have rattled communities across the country.

“The most threatening sound to an oligarch is laughter.”

NBC News correspondent David Noriega reports on the ground in Los Angeles, CA as citizens march in the 'No Kings' protests. "There are a lot of people out here who are the children of immigrants... They feel personally that a lot is at stake for them with these protests,

Fox News correspondent Jeff Paul has the latest on how Los Angeles is responding to potential violence at anti-Trump rallies on “Fox Report.”