The state-run bus was going to Hyderabad from Vijayawada when it hit the lorry on a road under Munagala police station area around 3 am, Deputy Superintendent of Police (Kodad sub- division) A Ramana Reddy told PTI over phone.
There were 36 passengers in the bus when the accident occurred, he said.
The left portion of the bus was damaged in the accident, the police official said.
The six deceased included a woman and the bus driver, Reddy said.