At Knott's Berry Farm, many fights broke out on Saturday night, causing the park to close early.
Numerous 911 calls, according to Buena Park police, indicated there may have been gunshots, but investigators on the site found no evidence of gunfire.
As they looked into the incident, police encouraged people to stay away from the area.
The park issued a statement saying, "The safety of Knott's Berry Farm's guests and staff is always our top priority."
"On Saturday night, it was decided to close the park three hours early because of disorderly conduct and fights involving several youths.
This behavior was inconsistent with the ideals of our park and was not what we want any visitor to Knott's Berry Farm to experience.