Huntington Beach police are asking the public to help identify additional suspects associated with the July 28 downtown disturbance.
Pictures of more than 20 alleged suspects who have not been named were posted on the Police Department's Facebook page Wednesday.
Some of the pictures show people pulling a stop sign from the ground and tagging on a police vehicle's bumper.
Police had arrested 11 suspects as of Wednesday, including two juveniles from Huntington Beach.
Authorities are asking the public to send information to firstname.lastname@example.org or call the tip line at (714) 375-5066.
—Anthony Clark Carpio