More than 100 people were arrested on Monday night in Los Angeles, as "fringe groups" continued late-night protests, City of Los Angeles Mayor Karen Bass said.

By Omar Younis, Brad Brooks, Phil Stewart and Idrees Ali LOS ANGELES (Reuters) -U.S. Marines deployed to Los Angeles made their first detention of a civilian on Friday, part of a rare use of military force to support domestic police and coming ahead of national protests over President Donald Trump's military parade in Washington.

U.S. Marines have temporarily detained a man after he walked onto the property of a federal building they were guarding in Los Angeles.

After a day of peaceful protests in Los Angeles, tensions mounted between protesters and Marines outside the federal building in downtown LA.

By Brad Brooks, Jorge Garcia, Idrees Ali and Phil Stewart LOS ANGELES (Reuters) -U.S. Marines were deployed to Los Angeles on Friday, the military said, in a rare domestic use of its forces after days of protests over immigration raids and as nationwide demonstrations were expected on Saturday,

California Gov. Gavin Newsom delivered a statewide address on Tuesday in the wake of immigration operations that sparked days of protest in Los Angeles and the deployment of hundreds of National Guard and U.S. Marines troops to the area by President Trump.

The Pentagon is scrambling to establish rules to guide U.S. Marines who could be faced with the rare and difficult prospect of using force against citizens on American soil, now that the Trump administration is deploying active duty troops to the immigration raid protests in Los Angeles.

Social media users claim a video of a Marine attack helicopter flew over LA to monitor protests. Military aircraft routinely fly out of air stations near San Diego, and the video was recorded before protests began in Los Angeles.

"No one signs up to join the United States Marine Corps to attack protesters," U.S. Rep. Seth Moulton, D-6th District, a former Marine, told MSNBC on Sunday.