The police have arrested a man for allegedly killing his 40-year-old elder brother, his pregnant sister-in-law and their minor son owing to a property dispute in the Raigad district of Maharashtra, an officer said.

The bodies of the three family members — Madan Patil, his 35-year-old wife and son — were found behind their house along the banks of a river at Kalamb village in Karjat area of Raigad district on the morning of September 8, news agency PTI reported. The couple's son was 11 years old while the accused's sister-in-law was seven months pregnant, the police said.