(WPXI) – Pittsburgh police are investigating a daylight shooting in Downtown Pittsburgh. Investigators said just before 1 p.m., they were called for reports of a person shot off Fort Duquesne Boulevard between Sixth and Seventh streets. Officers found a man lying in an alley at that location with a gunshot wound to the chest. They administered life-saving first aid measures until paramedics could arrive. The man was taken to the hospital in critical condition. A short time later, officers stopped a vehicle on the South Side. Two people from that vehicle were taken to police headquarters for questioning in relation to the shooting.