A fight that occurred on Saturday night at Six Flags America during the first weekend of Halloween Fright Fest has left a 15-year-old boy in a medically induced coma.

According to witnesses, the night was full of fights, but visitors started calling police at approximately 8:50 p.m. when a large brawl broke out amongst a group of teenage boys. Despite the other fights, authorities are continuing to call the altercation an “isolated incident.”

“It was panic, mayhem, chaos,” Katrina Walker, a mother who dropped her son and two of his friends off at the Prince George’s County theme park, said. “Everyone was fearful . . . parents were very scared because we had no idea if our children were hurt or if they got in the middle of something.”

According to Fox News, Six Flags denied the incident at first, and then changed their stance the next day. “Reports of mass fighting or serious injuries are completely inaccurate. The safety of our guests is of top priority,” the park said initially. “This park has a zero tolerance for inappropriate behavior. We will not allow any individuals or groups to disrupt the typical atmosphere of fun and enjoyment found here,” they later said in a statement on Sunday.

A 15-year-old DuVal High School student was taken to the hospital and was supposed to undergo surgery on Monday to relieve the swelling from his brain from being hit in the head. However, the surgery was cancelled when the swelling stabilized. The boy is expected to recover.

“His life is lying in the balance as a result of someone randomly hitting him,” Zina Pierre, a family friend, said. “He was hit blindly by the perpetrators and he was staggering, trying to get up, and some else came along to finish the deed.”

Authorities are still investigating the incident and are trying to determine if the fights were planned ahead of time.