An 18-year-old girl, who was also part of the family, was severely injured in the attack.
"Kanik Ram (55), his wife Meena Devi (48), son Chhotu (12) and daughter Bindi (18) were attacked with sharp-edged weapons late last night. While Bindi is undergoing treatment at a hospital where her condition was stated to be critical, the remaining family members had died on the spot," Sub-Divisional Police Officer Mukul Ranjan said.
He added that the incident took place in Harijan Tola under Jhandapur police outpost and apparently the family members were attacked while they were asleep.