IL Officer Injured when Teen Mob Storms Carnival

Five people were cited and a police officer was hurt after a " flash mob " of more than 400 teens created a disruptive and chaotic scene during a weekend carnival in the Chicago suburb of Tinley Park Saturday.

According to authorities, a group of about 400 teenagers were "responding to a call on social media" when they formed a "flash mob" at the Armed Forces Weekend Carnival, NBC Chicago reports.

The group began running through the parking lot, instigating fights among themselves in an effort to create chaos and disrupt the event, according to village officials.

More than 50 law enforcement officers, including some from neighboring agencies, responded to the scene, village officials said. One officer was injured while "while attempting to break up a fight." The officer was treated at a nearby hospital and later released, officials said.