The incident took place on Monday when a 28-year-old woman was set on fire inside a car by her husband in Saidapet at Chennai.
The name of the victim has been identified as Prema Nagarajan. The reports revealed that she had a fight with her husband Nagarajan while they were going to Teynampet.
While they were travelling in a Maruti Swift, Prema poured a bottle of petrol on herself.
Police said that the bottle of petrol was kept inside the car for emergency by Nagarajan who is a driver. He even said that Nagarjan left Prema and their children inside the car to die.
Prema suffered severe burn injuries before someone could come to help, police sources said.
Just after the incident, she was taken to Kilpauk Medical College at around 6pm on Sunday. Her four year old son Thisanth Raj is in a critical condition as well.
The case of murder had been filed against his husband.