Pittsburgh Police from Zone 2 responded to a ShotSpotter alert for rounds fired in the 2400 block of Bedford Avenue just before 3:30 p.m.
Responding units - along with members of the Allegheny County Sheriff's Office working in the area - located a 25-year-old male victim down on the ground with multiple gunshot wounds.
Medics worked on the victim, but ultimately pronounced him deceased at the scene.
One person was detained and transported to police headquarters for questioning.
Detectives from Major Crimes are investigating.
The investigation is ongoing.