Two sisters from Tambaram, about 50km from Chennai, slashed the throat of their brother after he decided to get married, reported Tamil Nesan.
The spinster sisters later carried out a suicide pact, resulting in the death of the younger sibling. Police investigations revealed that the sisters were upset when their brother, K. Manikandan, decided to get married as they felt that he would no longer support them financially.
Following an argument, the women slashed Manikandan's throat. However, he survived and escaped from their house where neighbours rushed him to hospital.
The younger sister, Nirmala Devi, was later found dead by authorities while Maha Devi, is being treated for self-sustained wounds.