Lightning struck Rangiam Primary School at Rasgobindpur at noon when the children were inside their classes, Sub- Divisional Police Officer, Betanati, Dhiren Chandra Nanda said.
Injured were rushed to a hospital.
In another incident in the same district, three women agricultural workers were injured after they were struck by lighting at Surukuna village. They were admitted at the community health centre at Khunta, police said.