Rourkela: Four persons were injured when lightning struck them at Gambaridih village under Tangarpalli police limits near here, police said on Saturday. A group of villagers was performing puja for rain gods when the lightning struck last evening, they said. Others present during the puja escaped unhurt. The area has been facing drought like situation in absence of sufficient rainfall. The injured, admitted to Rourkela government hospital, were stated to be improving, the police said.