The accident occurred near Karnpur village as two buses plying between Patna-Siwan and Siwam-Patna respectively collided killing six on the spot, Marhaura's Sub-Divisional Police Officer (SDPO) Kundan Kumar said.
One person died during treatment at the Chapra Sadar Hospital, while another succumbed to injuries on way to the Patna Medical College and Hospital (PMCH) in the state capital, he said.
As many as 17 others sustained injuries. Three of them were being treated at Marhaura referral hospital, while the remaining ones were undergoing treatment at the Sadar hospital, the SDPO said.
Both the drivers escaped after the incident even as the vehicles have been impounded, Kumar said.