A police constable in Tamil Nadu's Villupuram allegedly killed his girlfriend in her own house on her birthday after an argument and then shot himself on Tuesday, police said.
The woman, a 21-year-old medical student had met the constable on social media.
The constable, Karthick, had gone on her house on her birthday.
An argument broke out between the couple and in a fit of rage, the constable shot the woman with his revolver and then shot himself in the head, police said.