Miscreants set a bus of 'Raida Paribahan' on fire at Sayedabad in the capital Dhaka on Wednesday night.
Torching the bus was reported around 7:35 pm, said Rafi Al Faruk, duty officer at Fire Service and Civil Defence headquarters.
Later, two units of firefighters from Postagola Fire Station went to the spot and were trying to douse the blaze, he said.
However, no casualties were reported in the incident, the official added.
TT/SU