The Marine battalion of 700 active duty military troops were poised to support 4,000 National Guard soldiers if needed, overriding the opposition of California officials and local Los Angeles

Roughly 500 Marines based out of the Marine Corps Air Ground Combat Center in California have been mobilized to respond to the protests in Los Angeles, according to three people familiar with the matter,

Defense sources tell NBC News hundreds of Marines are being mobilized to support National Guard members in Los Angeles as protests continue over the administration’s immigration policies. NBC News Correspondent David Noriega reports the latest on the ground.

Tear gas was used against protesters outside a federal detention center in Los Angeles on Sunday, creating a tense moment during an otherwise largely peaceful day of immigration raid demonstrations.

The spokesperson told CNN the Marines "have not completed [Standing Rules for the Use of Force] and nonlethal weapons training."