At least three people were killed and 13 others injured in separate road accidents in Raiganj upazila of the district on Tuesday.
The deceased were identified as Ambia Begum, 70, wife of Rajab Ali, Sukur Ali, 35, and Mokaddes Ali, 40, son of late Abdus Samad.
Officer-in-charge of Hatikumrul Highway Police, Akhtaruzzaman said a Bogura bound bus of Ayshinisha Paribahan collided head-on with a truck around 11:30am on Bogura-Nagarbari highway in Bhuiyagati area killing Ambia and Sukur on the spot and injuring 13 others.
The bodies were sent to Sirajganj Sadar Hospital for autopsy, he said.
Meanwhile, a pedestrian was killed as a Dhaka bound microbus rammed him while he was crossing the highway in Pacholia area of Raiganj upazila in the morning, the OC said.
Deceased Mokaddes was a construction worker, he added.