Satya Prakash Sharma (47) was working in his office in Khindauda village when the attackers barged inside and opened fire, killing him on the spot, SP Ravi Shankar Chavi said.
As the attackers were fleeing, the villagers caught hold of one of them and beat him up severely, the SP said, adding that he was rushed to hospital by the police but the doctors declared him dead.
Family enmity is said to be the reason behind the crime, the SP added.