BATON ROUGE, La. (AP) — Police say an argument between two parties in the check-out line at a store escalated into shots being fired in the Cortana Mall parking lot in Louisiana.

Baton Rouge police spokesman Sgt. L’Jean McKneely Jr. says crews responded around 6:30 p.m. Sunday to reports of a shooting in the Dillard’s parking lot.

The Baton Rouge Advocate reports officers were unable to locate anyone with gunshot injuries in the area but haven’t ruled out the possibility that someone may have been shot.

McKneely says the altercation began when two people began arguing while waiting to make purchases. The groups then went to the parking lot and exchanged gunfire.

Police believe there were at least two shooters, though McKneely says he was unsure how many people were actually involved because they fled.