A verbal confrontation between two men on a Pittsburgh Regional Transit bus escalated into a physical altercation in the 5000 block of Penn Avenue.
Pittsburgh police from Zone 5 were called there for a reported stabbing.
One of the men was reportedly stabbed in the stomach and bystanders were providing first aid when police arrived.
The victim was taken to a local hospital in critical condition. Police found the alleged suspect on Baum Boulevard and after he resisted arrest, he was tased and taken to the hospital before being transported to the Allegheny County Jail.
Charges are pending.
