Legal experts questioned Trump’s response to unrest in Los Angeles, saying the National Guard personnel involved will face strict limitations under the law.

National Guard troops arrived in Los Angeles early Sunday on the order of President Trump after protests roiled the city in recent days as federal law enforcement officers carried out immigration operations in the region.

Trump has said he is deploying 2,000 California National Guard troops to Los Angeles to quell the protests, which he called “a form of rebellion.”