ST. LOUIS (AP) — A nighttime shooting at a bar in St. Louis left six people were injured, three of them critically.

The shooting happened around 10 p.m. Sunday at the Playground Bar & Grill on the city’s north side. Police officers found two victims inside the bar. Four other people shot at the bar were taken to hospitals before officers arrived.

Police said that they are still trying to determine what led to the shooting and that several would-be witnesses fled after the onslaught of shots.

Two victims were in critical condition and one was in critical but stable condition. Three others were listed as stable.