Dozens of masked U.S. Border Patrol agents showed up in trucks outside of the news conference at the Japanese American National Museum.

The armed and masked agents assembled outside a museum where the governor was speaking in what Mayor Karen Bass of Los Angeles called “a provocative act.”

Federal agents turned up in downtown Los Angeles, where Gov. Gavin Newsom was delivering a speech, and detained at least one person in the latest high-profile immigration enforcement operation in the city.