A 21-year-old man allegedly stabbed to death three members of his cousin's family, including his four-year-old son, in tribal-dominated Malwadi village in Igatpuri tehsil of the district, police said on Sunday.

According to police, the accused, Sachin Ganpat Chimate, committed the crime as he was angry over their frequent taunts on his being jobless. The incident took place yesterday morning and the accused was arrested from the village in the evening, police said.