What appears to be a sale gone bad led to a shooting Tuesday on Petaluma Boulevard South, according to police. No one was injured and no victims or suspects have been identified.

Police could not say if the incident was related to drugs or other illegal transactions.

Officers responded to reports of shots fired at a silver Pontiac heading south on Petaluma Boulevard South at about 10 p.m. Tuesday night. Witnesses at the scene reported seeing the Pontiac pull up next to a Honda prior to the shooting.

Witnesses told officers that a male subject got out of the Honda and passed a large, black trash bag filled with an unknown substance to a female who exited the Pontiac. After both people returned to their cars, the female began to drive away. As she did, a black male adult got out of the Honda and ran over to the moving Pontiac. Authorities said he began pounding on the Pontiac's windows as the car drove away from him.

He proceeded to chase her down the road. When he couldn't catch up to her vehicle, he apparently stopped and pulled a gun out, firing three shots at the Pontiac.

Lt. Tim Lyons said that officers found bullet shell casings at the scene, but that no victims have come forward so far.

"It appears to be some sort of transaction gone bad, but that's all we know right now," said Lyons.

Police are asking anyone with information on this incident to call the Petaluma Police Department at 778-4372.