Three of a family including a seven-year-old child were killed in a road accident on Nagarbari-Bogura highway in Sirajganj's Shahzadpur upazila last night. The incident took place around 7:00pm near the Shahzadpur bus stand when a speeding bus hit a battery-run auto-rickshaw from the rear and fled from the scene, leaving the passengers of the three-wheeler dead on the spot,