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.

The curfew extends to sections of downtown Los Angeles where protests have turned into instances of vandalism and looting.

Six Americans tell the BBC that there's clearly a problem in Los Angeles - they just don't agree with who's at fault.

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.

Trump watched the U.S. Army demonstrate a missile strike, a helicopter assault and a building raid at Fort Bragg on Tuesday.

Protesters and police are facing off in Los Angeles, and anti-ICE protests have occurred across the country. Follow for live updates

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.

Authorities swept in with flash-bangs and tear gas grenades to disperse hundreds of protesters in Los Angeles.