Deputy Superintendent of Police, Sahapur division, Vishal Thakur said Dalu Kalu Sonawane (35) attacked his brother-in- law Sandip Burane with a sickle, killing him on the spot.
Sonwane and Burane were both residents of Umbarmali village.
Police said the accused is a drunkard and because of it, the couple would often get into a fight. Burane would then intervene and broker a peace between the two.
The couple yesterday involved in an argument and Burane tried to intervene. Flying into a rage, Sonawane hit him hard with a sickle, killing him on the spot.
The accused, who has been booked under relevant sections of IPC, is at large, police said.