The woman with injuries in her neck was hospitalised late Friday after the incident but died on Saturday without responding to treatment. (Representative image: Getty)

A young man under home quarantine for coronavirus after return from Sri Lanka suddenly ran out of his house half-naked and fatally bit an 80-year old woman in his neighbourhood in a village near Theni in Tamil Nadu, police said on Saturday.

The accused, a textile trader from Theni, had recently returned from Sri Lanka. He reportedly ran out of his home half-naked, bit the 80-year-old woman's throat and killed her. The victim was identified as Nacthiammal.

Hearing the 80-year-old's cry, her neighbhours came to her help, overpowered the accused and took her to Theni Government Hospital where she succumbed to her injuries.

Police arrested the accused and claimed that he was 'mentally disturbed' after being under home quarantine.