National Guard troops clashed with protesters in Los Angeles Sunday, firing tear gas at a growing crowd downtown as protests against federal immigration sweeps continued for a third day.

As the military presence ramped up in Los Angeles, communities are preparing for the largest protests against Trump since he took office.

Having been deployed to Los Angeles by President Donald Trump in order to quell protests against ICE, U.S. Marines detained their first civilian on Friday: an Army veteran on his way to the Department of Veterans Affairs.