Thousands of "No Kings Day" protests are set to be held throughout the country on Saturday to protest the Trump administration.

Protests that break out remain mostly peaceful during the day, but at night agitators engage in fiery clashes with police.

Demonstrators gathered in communities large and small. Many events on the East Coast have ended, but police clashed with some protesters in L.A.

Andrea Nakano reports on an organizer pushing for peaceful protest. It comes as the FBI offers a reward for a person seen hitting a federal agent at a Concord protest. Website: YouTube: Facebook: I

Police on horseback dispersed crowds in L.A. before the curfew came into effect at 8 p.m. local time on Wednesday evening. (The curfew lifts at 6 a.m.) An estimated 400 arrests and detentions have taken place so far amid the ongoing protests in the southern Californian city.

With migrant communities already living in fear amid the Trump administration's immigration crackdown, ICE raids in downtown Los Angeles sparked days of protests.

News coverage of the immigration raids and protests in Southern California has transfixed Mexico, where reports have heavily sided with the immigrants against U.S. efforts to detain and deport them.

In recent years, in Baltimore and elsewhere, there have been efforts and scholarship on how cities can best handle demonstrations and how organizers can most successfully promote their cause.

A frightening scene played out at the "No Kings" protest in Salt Lake City, UT on Saturday — as gunshots were fired leaving one man critically wounded.

Demonstrators hit the streets again in L.A. after President Trump deployed the National Guard due to protests against ICE raids.