Pittsburgh Bureau of Police officers from Zone 2 responded to a Shotspotter alert of multiple rounds of gunfire on Perry Street near Wylie Avenue in the Hill District just after 1:30 a.m.
When they arrived on scene they discovered three parked vehicles that had been struck by bullets.
The Crime Scene Unit arrived to process the scene.
There were no victims at the scene and no immediate reports of victims turning up at local hospitals.
Police are investigating.