The incident took place at Gaderadda village when the victims were sleeping in their house. Some unidentified persons entered the house and threw acid on them in the wee hours and fled, police said.
One Veerababu, who received severe injuries, was taken to a local hospital where he died during treatment. The other three members of the family are undergoing treatment in the hospital and their condition is stated to be stable, they said.
Family feud may have led to the attack, police said, adding a case has been registered.
