"Nine persons were travelling in the SUV from Machharhatta area of Patna to attend a marriage function at Kuria village in Bagaha in West Champaran district. Suddenly a truck came in front of the vehicle and rammed into it," Chakia Deputy Superintendent of Police Mundrika Prasad said.
The accident took place on National Highway 74 near Dilia Bazar.
The DSP said the collision was so severe that three persons died on the spot. One more died while being taken to hospital .
The truck driver escaped after the accident, leaving his vehicle behind. It has been seized by the police.
The victims have been identified as driver of the SUV Sonu Sharma (30), Vijay Mahto (50), Manish Kumar (32) and Shyam Prasad (30), he said.