The crash happened late Thursday night
Pittsburgh Public Safety said three officers who happened to be in the area came upon the burning car, reached in and freed the unconscious man from the vehicle.
The man was taken to the hospital in critical condition
The officers were not hurt when they rescued sthe man..
Five passengers and a bus driver were on board the Port Authority bus that was involved in the crash.
Four of the five passengers were taken to the hospital with non-life-threatening injuries.
The cause of the crash is under investigation.