An armed man was arrested on Saturday in the area of a "No Kings" rally in West Chester, Pennsylvania, police said.

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.

Organizers designated Philadelphia as the lead city in a movement spanning the nation, with over 2,000 protests planned.

"No Kings" rallies brought demonstrators together, joining voices across the nation and region to protest what they call a growing threat of authoritarianism in American politics.

Hundreds gather at the Statehouse to take part in the "No Kings" rally -- one of many happening across the U.S. on Saturday.

The parade, honoring the Army’s long-planned 250th anniversary celebration and coinciding with Trump’s 79th birthday, is set to step off from the Lincoln Memorial under the threat of stormy weather in Washington and protests around the country tied to a turbulent week of immigration enforcement that has involved military deployment in Los Angeles.

A flagship "No Kings" march and rally are planned in Philadelphia, but no events are scheduled to take place in Washington, D.C., where the military parade will take place on Trump's 79th birthday. Organizers of the protests say they want to take attention away from the parade.

Philadelphia will be the site of a “flagship protest” in a nationwide movement opposing President Donald Trump’s Administration on the same day as a major military parade in Washington. The demonstration is expected to disrupt traffic throughout the day.