Bir Singh Yadav was axed to death allegedly by his younger brother Kamal Singh Yadav (26) at Khairana village, about 45 km from Rewari, last night, police said.
A case of murder has been registered against Kamal on a complaint filed by Bir Singh's wife Sapna Devi.
In her complaint, Sapna has alleged that Kamal Singh killed her husband because he harboured ill-intentions towards her.
Efforts are on to arrest Kamal Singh, who is absconding, a senior police official said.