The passenger bus was bound for Phuentsholing in neighbouring Bhutan from Assam.
The bomb, concealed at the rear side of the bus, exploded when the bus stopped at the Chowpati and passenger were about to disembark.
According to reports, police have reached the spot.
The injured were rushed to the Alipurduar civil hospital for treatment.
More details are awaited.
--IBNS (Posted on 18-08-2013)