Just before 3:15 p.m. Pittsburgh Police from Zone 1 responded to reports of a person stabbed inside a residence in the 3800 block of California Avenue.
Responding officers attended to a male victim who had suffered a stab wound to the neck. He was transported by EMS to the hospital in critical condition.
A male suspect reportedly fled the scene in a vehicle.
Detectives from Major Crimes and the Crime Scene Unit responded to process the scene.
The investigation is ongoing.