Thousands marched and rallied peacefully during the No Kings OKC protest on June 14, the same day as the U.S. Army 250th Anniversary military parade.

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.

The event was one of more than 2,000 “No Kings” rallies held across the country on Saturday, protesting what organizers call “authoritarianism, billionaire-first politics, and the militarization of our democracy.

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.

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.

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.

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,

Millions marched in cities and towns across the U.S. in "No Kings" protests to rally against the Trump administration.