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.

Anti-ICE protests continue in Los Angeles after the National Guard was deployed following immigration enforcement actions.

A cloud of uncertainty is hanging over Los Angeles, where questions remain over the role that Marines and National Guard troops will play after being called in by President Donald Trump amid protests over immigration raids in the city.

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.

California Gov. Gavin Newsom filed an emergency motion on Tuesday to block the Trump administration's deployment of Marines and National Guard.