I haven't heard about any tear gas except the over-reaction around the federal courthouse in LA. From the LA Times:

Standoff with military, police
By mid-afternoon Saturday, a crowd of a few hundred protesters had surrounded the Federal Building downtown, where dozens of U.S. Marines stood guard at the entrance, clutching guns and shields. The crowd chanted “shame,” “leave L.A.” and “we don’t want you.”

At 4:13 p.m., LAPD posted to X that it had declared a dispersal orders on the streets directly surrounding the building: Los Angeles Street between Aliso and Temple streets and Alameda Street south of Aliso Street and north of Temple Street.

“People in the crowd are throwing rocks, bricks, bottles and other objects,” the post said. “Less lethal has been approved. Less lethal may cause discomfort and pain. It is advised that all persons leave the area.”

Around that time, police on horseback charged into a crowd, ordering protesters to leave. They shot what appeared to be rubber bullets and waved batons at the scattering crowd. Within minutes, police had cleared the area in front of the federal building and moved people away from federal troops.

Violet Martinez, 23, said he was by the Federal Building when officers on horses charged into the crowd. “They put on their gas masks then began firing tear gas,” Martinez said. He said some people got trampled by horses others were hit with rubber bullets. “There was no reason to do that,” Martinez said.

Further down that same article (there's a paywall, why I'm not linking):

June 14, 2025
At a Saturday morning press conference, Mayor Karen Bass made a plea for peaceful protests, warning “the eyes of the world” were on Los Angeles.

“Please, please, do not give the administration an excuse to intervene,” she said. Bass said an 8 p.m. curfew would remain in effect Saturday night and implored protesters to stay away from violence and vandalism.

“Don’t even try,” she warned.

The mayor emphasized there had been no cooperation between the Los Angeles Police Department and the federal government, leaving local leaders guessing where federal troops would crop up Saturday among the thousands of California National Guard troops and hundreds of U.S. Marines authorized by Trump.

“We are functioning based on rumors that we hear ... I’m still waiting to hear if the president will take my call,” she added. Police officers, she said, had been deployed “strategically” and would continue to operate under a unified command with the California Highway Patrol, the Sheriff’s Department and Los Angeles Fire Department.

Since Trump only gets his briefings and any news via FOX and OAN type sources, he is convinced LA is in flames and there is rioting in the streets.

Trump has defended the federal government’s actions.

“If I didn’t send the military into Los Angeles, that city would be burning to the ground right now. We saved L.A.,” the president posted on his Truth Social account Friday. Local law enforcement and politicians have disputed that depiction.

Speaking to reporters Thursday at the White House, Trump briefly addressed the “No Kings Day” events.

“I don’t feel like a king, I have to go through hell to get stuff approved,” he said, referencing the fact that he has had to negotiate with members of his party to accomplish legislative priorities. “No, no, we’re not a king, we’re not a king at all, thank you very much.”