( 4UMF NEWS ) Several Injured At Teen Choice Awards:

Firefighters and hazardous materials officials are on scene at the Avalon nightclub in Hollywood after concertgoers were injured by a fog machine.

According to Twitter reports, the space, located on Vine Street near Hollywood Boulevard, was hosting the Teen Choice Awards Pre Party beginning at 6 p.m. Saturday.

The event came to an abrupt end 20 minutes later when several patrons complained of breathing problems after exposure to theatrical fog vapors, according to Los Angeles Fire Deparment spokesman Brian Humprey.