Shortly before 9 p.m. Tuesday, law enforcement officers in Anaheim issued a dispersal order to protesters at the intersection of Anaheim and Broadway.
One officer used a megaphone to declare an unlawful assembly and shouted to demonstrators to leave the area: "You must disperse ... if you do not, you will be arrested."
At least two arrests have been made, authorities said, and an Orange County Register reporter was injured by a thrown rock.
Just after 9 p.m., authorities fired non-lethal projectiles into the crowd, scattering many of the demonstrators.
Dozens of officers began attempting to clear the intersection about an hour earlier. Protesters threw bricks, bottles and shoes at officers. One man in a blue jersey was tackled and carried away by police.
The crowd quickly moved toward a corner gas station, where people pounded on pumps as others chanted "Si se puede." Some set off firecrackers in the lot as people ran away. At one point a black police truck was struck by an object.
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