A group of nine teenagers allegedly attacked a 12-year-old boy and his parents at a Six Flags in Gurnee, Illinois, during a dispute over line cutting.

The Chicago Tribune reported that the incident occurred Saturday night during the amusement park’s Fright Fest. Gurnee Deputy Chief Brian Smith claimed that the teens cut the line while hurling profanities, with the situation escalating when one of them sucker punched the 12-year-old.

When the mother and father attempted to intervene, the group surrounded the parents and repeatedly punched and kicked them, according to authorities.

“It did not appear that anyone immediately came to their aid, but numerous people reached out to Six Flags employees, as well as calling 911 to get them help,” police told reporters.

Smith explained that police allowed the suspects to leave the park and arrested them on a road near the entrance without incident. He also explained to CBS Chicago that Fright Fest attracts “an increased number of knuckleheads who come to stir things up.”

Eight of the suspects range in age from 15 to 17. Smith said three of the teens are facing aggravated battery charges. One of the teens was also charged with obstruction of justice for providing officers with a fake name, according to the Chicago Tribune. Authorities haven’t revealed their identities due to their age.

The ninth suspect, Gregory Battle, 18, was charged with aggravated battery causing great bodily harm, aggravated battery in a public place, and mob action. CBS Chicago reported that he was released from custody after posting bond.

[Featured Image: Gurnee Police Department]