The main gas supply line to Narsingdi was damaged during construction work on a drain, according to Titas Gas authorities
Police said a bus went off the road at Mymensingh's Trishal Upazila around 6:30am leaving at least 15 other passengers injured.
Trishal police OC Moniruzzaman said that the Dhaka-bound bus lost control while overtaking another bus and veered off the road killing a woman and child on the spot.
At least 16 other passengers were rushed to the Mymensingh Medical College Hospital where one succumbed to the injuries.
OC Moniruzzaman said the passengers claimed that over speeding leading to loss of control led to the accident.