The 17-year-old girl Haitha allegedly committed suicide by hanging, after which her father went to the home of her lover Aneesh and hacked to death his mother, who was alone at the time, they said. The man was later arrested.
Police said Aneesh had gone to the girl's house and told her father they were in love and that he wanted to marry her. However, the father refused to give his consent, following which there was a heated exchange between them.
Meanwhile, Haritha went to her room and hanged herself from a ceiling fan, they said, adding she was declared dead at a hospital where she was rushed to.
The shocked father then rushed to the home of Aneesh and hacked his mother to death, police said, adding he was arrested last evening after locals alerted them on seeing him coming out of the house with a blood stained knife.