Quetta - Unknown armed robbers hijacked a passenger bus with 22 passenger on Saturday near Nag area of Panjgour. According to police, a passenger bus was on its way from Panjgour to Khuzdar when unknown armed persons intercepted it near Nag area and drove it towards nearby mountains. Police said that around 22 passengers were travelling in the bus. Source said that driver and conductor of the bus succeeded to escape. The dacoits looted the valuables of passengers and tortured them on offering resistance. Police have started efforts for recovery of passengers and bus.