Authorities say three people have been shot in a large throng of Halloween revelers in Hollywood.
The disturbance sent a flood of police into the area to control the crowd.
Police Sgt. Andrew Chao of the Hollywood Station tells City News Service that the shooting took place around 10 p.m. on Hollywood Boulevard.
He says a 17-year-old boy was critically wounded with gunshot wounds to the chest and a leg. Two others were less seriously hurt.
Chao says the gunmen fled, possibly in a white sport utility vehicle.
Video footage by KNBC shows several hundred people along Hollywood Boulevard and at least three men taken into custody in handcuffs.