Pittsburgh Police from Zone 3 received a ShotSpotter notification for three rounds fired in the 2100 block of Wharton Street just before 3 p.m.
As units arrived on scene, all of the shooters involved had fled from the area.
Initial reports indicated that a female had suffered a gunshot wound, but no victims have been reported at area hospitals.
Officers cleared one business whose windows had been shot out. Witnesses inside the store indicated that a shootout between patrons occurred when two males entered the clothing store and began shooting at two other males who were already inside and fired back.
The two initial actors reportedly fled the store in a silver sedan, while the two males who had been inside, fled out the back exit and down Carson Street.
The Crime Scene Unit is processing all evidence, including camera footage.
Zone 3 detectives are investigating.