Two workers sustained severe burn wounds after a transformer they were working on malfunctioned and exploded in a town in Maharashtra's Thane district, police said on Tuesday.

An offence under section 338 (causing grievous hurt by act endangering life or personal safety of others) of the Indian Penal Code was registered against the contractor who had taken up the repair work, inspector Sharad Zine of Khadakpada police station said.