A 50-year-old woman and her two daughters from Urumandampalayam near Coimbatore were suffocated to death after the battery of uninterruptible power supply (UPS) system exploded in their house on Monday night.
A pet dog of the family was also killed in the incident which came to light on Tuesday.
J. Vijayalakshmi,50, her daughters J. Archana, 24, and J. Anjali, 21, residents of Rose Garden at Urumandampalayam were found dead on Tuesday morning.