Dacoits held the passengers in a bus hostage at gunpoint and made off with valuables on Indus Highway in Tangwani, reported 24NewsHD TV channel on Sunday.
The dacoits fired shots at the bus to stop it which also left its windowpanes broken and tyres burst.
The incident took place at Magsi Stop in the jurisdiction of Dera Sarki police station.
The passenger coach was going from Quetta to Sadiqabad, a city in Punjab.
Reporter: Ramazan Mirani