The mishap occurred when the overcrowded bus hit the lorry in Dhanarua police station in Patna district, Senior Superintendent of Police Amit Jain said.
"All of them died on the spot and their bodies have been extricated," he said.
The police fear more bodies might be trapped inside the mangled bus.
Ten of the critically injured have been admitted to Patna Medical College and Hospital, he added.
Story first published:
June 26, 2010 12:42 IST