Pittsburgh Police from Zone 1 were dispatched to the 900 block of Pennsylvania Avenue for a ShotSpotter alert for shots fired just before 3 p.m.
Arriving units located an adult male victim with a gunshot wound to the upper left chest area. He was transported by medics to an area hospital in critical condition.
The Mobile Crime Unit processed evidence at the scene. There are no arrests at this time.
The Violent Crime Unit is investigating.