The bus carrying 50 students and 13 teachers of 'Mansingha Banishri Bidya Niketan' of Khejuri in Purba Medinipur district was going to Ayodhya Hills in Purulia district when it hit the lorry laden with stone chips, Bankura SP Sukhendu Hira said.
The accident occurred at Morar under Bishnupur police station at 5.40 am.
The injured seven teachers and 11 students were rushed to Bishnupur sub-divisional hospital, the SP said.
Police officials have rushed to the spot after receiving the information, the SP said.