Los Angeles police swiftly enforced a downtown curfew Tuesday night, making arrests moments after it took effect, while deploying officers on horseback and using crowd control projectiles to break up a group of hundreds demonstrating against President Donald Trump’s immigration crackdown. Members of the National Guard stood watch behind plastic shields, but did not appear to participate in the arrests. Hours later, many of the protesters had dispersed, although sporadic confrontations continued that were much smaller than in previous nights. Officials said the curfew was necessary to stop vandalism and theft by agitators looking to cause trouble. Democratic Gov. Gavin Newsom earlier accused Trump of drawing a “military dragnet” across the nation’s second-largest city with his escalating use of the National Guard. He also deployed Marines, though none were seen on the streets Tuesday. Newsom asked a court to put an emergency stop to the military helping federal immigration agents, with some guardsmen now standing in protection around agents as they carried out arrests. He said it would only heighten tensions and promote civil unrest. The judge set a hearing for Thursday, giving the administration several days to continue those activities. The change moves troops closer to engaging in law enforcement actions like deportations as Trump has promised as part of his administration’s immigration crackdown. The Guard has the authority to temporarily detain people who attack officers but any arrests ultimately would be made by law enforcement. Trump has activated more than 4,000 National Guard members and 700 Marines over the objections of city and state leaders. They were originally deployed to protect federal buildings.