Intermittent blasts and leaping fire created panic in the 2 km radius of the accident site after the mishap occurred right after midnight last, and people living along the Highway and shops ran seeking help.
The police have lodged an FIR against three people and efforts are underway to arrest them.
'We are now probing the incident. The confessional statement of the victim was also recorded before her death,' the police official said.
Gurunatham, who had received 80 per cent burn injuries while trying to save his boss, died at the Apollo DRDO Hospital.
In a separate incident, an elderly woman was killed in a leopard attack in forest area near Ramgaon village in Bardia area, forest officials said.
