THIRUVANANTHAPURAM: A 21-year-old motorcyclist was killed after being run over by a KSRTC bus near Venjaramoodu on Thursday. The police identified the dead as Jishnu of Maruthoorkonam. The incident took place near Alanthara. According to preliminary information, the youth was run over by the bus after his motorcycle was knocked down by another vehicle. The Venjaramoodu police have registered a case in connection with the incident.