A fight erupted Sunday afternoon at a normally quiet Ventura park, sending dozens of people running for cover from gunfire and flying rocks.
One youth was reported to be injured in the incident, and police detained one man for questioning.
An argument between two groups believed to be rival gangs apparently sparked the violence, which broke out around 5 p.m. at Hobert Park near Petit Avenue and Telegraph Road, police said.
Witnesses said they heard as many as four shots fired during the melee, touching off panic among the 80 to 100 people who were at the park. Witnesses also reported the two groups throwing rocks at each other.
One man was apparently beaten during the incident and taken by friends to a local hospital for treatment. As of 7 p.m., however, police could not locate the man, who police believe was beaten with a tire iron or baseball bat. No other injuries were reported.