A cloud of uncertainty is hanging over Los Angeles, where questions remain over the role that Marines and National Guard troops will play after being called in by President Donald Trump amid protests over immigration raids in the city.

Protests began that morning outside Paramount Business Center, an office park at the 6400 block of Alondra Boulevard, which houses a Department of Homeland Security office that served as a staging point for federal forces. Protesters kicked and threw objects at agents, while officers used flashbang grenades, tear gas, and rubber bullets.

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

The change moves troops closer to engaging in law enforcement actions like deportations as Trump has promised.