The robbers boarded the bus near Jadupur, where it had stopped briefly and while on the move, the held the conductor Abdul Nurul Hassan at gun point and instructed the driver not to stop the vehicle, an officer of Englishbazar police station said.
The robbers looted Rs 39,000 in cash and three mobile phones from the passengers and then got down at a secluded spot near Jalalpur, the officer said.
No one was injured in the incident, the officer said adding, the conductor has lodged a complaint with Englishbazar police station and search was on to trace the miscreants.