Nine teens and one adult are facing robbery charges in the wake of recent protests over the George Zimmerman trial and the "bash mob" vandalism that occurred in Hollywood in mid-July.
The teens allegedly took cell phones, a wallet and a skateboard from people walking on the Hollywood Walk of Fame.
Jane Robison, a spokeswoman for the Los Angeles County district attorney's office, said Tuesday all nine have pleaded not guilty in an incident at the busy intersection of Hollywood and Highland.
Police believe the so-called "bash mob" was organized through social media.
Bash mobs are like a flash mob but instead of dancing a choreographed number in public places, a bash mob converges to steal and vandalize.
Three girls and two boys, all 16, and four 15-year-old boys were charged.
Police have been trying to stay one step ahead of such mobs, and have recently issued warnings ahead of possible bash mobs.
The adult who was charged, 28-year-old Los Angeles resident Shareef Abdullah, allegedly tried to steal TV cameras belonging to two news crews covering the protests that followed the trial of George Zimmerman, who was found not guilty in the shooting death of Florida teenager Trayvon Martin.
Abdullah allegedly grabbed a $7,000 camera from a Telemundo crew, but the cameraman managed to get it back. Later that night, Abdullah allegedly threatened to shoot a CBS cameraman and then got away with his camera, according to a statement from the Los Angeles District Attorney's office.
Abdullah was charged with attempted grand theft, robbery and making criminal threats.