At least six people were injured tonight in a shooting outside a high school on Chicago’s South Side. Chicago police say they believe the shooting at Paul Laurence Dunbar Vocational Career Academy was gang-related.

Authorities say 200 officers are in the area looking for the shooters, but no one has been identified as suspects or arrested. Police say the shots came from a vehicle that pulled up outside the building as a basketball game was getting out. Chicago police superintendent Jody Weis called the shootings “a tragedy.”

Of the victims, three males were in serious condition and two males were in critical condition, but hospital spokespeople later said at least three victims were in good condition. They were taken to area hospitals with gunshot wounds. A sixth female was injured in the rush to flee the bullets.