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 demonstrations featured more violence and arrests, with some protesters throwing objects at law enforcement, and authorities responding with less-lethal munitions.

The California Governor has sued the U.S. President over the mobilization of the National Guard, calling it “an unmistakable step toward authoritarianism.”

National Guard troops with riot shields pushed protesters into the streets, as tear gas was deployed and less-than-lethal rounds exploded in the roadway.

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.

California Gov. Gavin Newsom has asked a federal court to block the Trump administration from using the National Guard and Marines to assist with immigration raids in Los Angeles, saying it would only