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.

President Donald Trump has deployed 4,000 National Guardsmen and 700 Marines to LA. But California Gov. Gavin Newsom and California Attorney General Rob Bonta are suing the Trump administration, saying they unlawfully "trampled over" California’s sovereignty when they federalized the California National Guard.

Tensions flared in Los Angeles late Monday after Trump escalated military presence in the region against the wishes of California Gov. Gavin Newsom.

California sued Trump over the deployment, with the state attorney general arguing that the president had “trampled” the state’s sovereignty. California leaders accused Trump of fanning protesters’ anger, leading crowds to block off a major freeway and set self-driving cars on fire.

President Donald Trump has sent U.S. Marines to Los Angeles in an effort to quash anti-ICE protests that have ravaged parts of the city on Tuesday. Images from L.A. show masked protesters blocking roads,

By Brad Brooks, Phil Stewart, Idrees Ali and Dietrich Knauth LOS ANGELES (Reuters) -Hundreds of U.S. Marines arrived in the Los Angeles area on Tuesday under orders from President Donald Trump, as the city's mayor declared a curfew for parts of the downtown area and police arrested 197 people in a fifth day of street protests.

Calling President Trump a threat to the American way of life, Governor Gavin Newsom depicted the federal military intervention in Los Angeles as the onset of a much broader effort by Trump to overturn political and cultural norms at the heart of the nation’s democracy.

President Donald Trump is moving swiftly to act on his immigration promises with little internal restraint, determined to test the bounds of his executive authority in order to fulfill the promises of his reelection campaign.

As protests continue in Los Angeles, hundreds of U.S. Marines have been deployed to the city as President Donald Trump and Governor Gavin Newsom spar over law enforcement response.