Three unidentified motorcycle-borne youths fired on a Punjab Roadways bus, which was travelling from Ferozepur to Ganganagar on Tuesday. As per information, the bus started its journey from Ferozepur city at 5:10 pm and, when it crossed Karian Pehlawan village on the Ferozepur-Fazilka road, three motorcycle-borne assailants fired at the driver's side of the bus.