Leave your guns at the door when you join "World Gym".

Two young men in their twenties are seriously injured after gunfire erupted in a Northeast Philadelphia gym. Patrons described the chaos as shots were being fired and dozens of people ran for cover.

Supposedly the fight started during and over a game of pick up basketball. There are no names released yet of the two injured men. Police are looking at video for men that got away in a black sedan.

World Gym is on 11000 Roosevelt Boulevard. They had half the calvary out looking for these guys. Helicopters and all kinds of cop cars and wagons going for several hours.