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.

"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.

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,

Eric Trump, one of President Donald Trump’s sons, criticized those protesting the immigration raids in Los Angeles by calling them “mongoloids,” an offensive term to describe those affected with Down syndrome. Trump and his allies have condemned the protests despite them being largely peaceful before he ordered the National Guard to respond.

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.

In an exclusive interview with Meet the Press, Sen. Adam Schiff (D-Calif.) condemns President Trump’s call to send the National Guard and Marines into Los Angeles amid protests and criticizes the forceful removal of fellow California Sen.