Bui Khac Dat, 42, was driving his wife, 34, and their 9-year-old son on a road in Nho Quan District Tuesday when a truck hit them at a sharp turn.
The truck, driven by 56-year-old Luu Van Nam, hit the motorbike so hard that they were thrown into a field about three meters away from the road. Local reports say all three people on the motorbike died on the spot while the truck was mildly damaged in the front.
The fatal accident is being investigated, local authorities said.