The incident took place last night. Survadev (60), his wife Diljani (55) and their daughter-in-law Suman (30) were killed when their house caught fire after the stove on which food was being cooked burst, police said.
Survadev's son Ram Dheraj, who rushed to save the three, also suffered serious injuries and was admitted to hospital, police said, adding that the bodies have been sent for post-mortem.