A man has died after he lit a cigarette while using an oxygen tank, causing an explosion inside an Oshawa home.

Durham Regional Police say it happened inside a home on Park Road South, near Bloor Street West and Philip Murray Avenue, at around 9:20 a.m.

Investigators believe the male was using an oxygen tank and breathing apparatus when he lit a cigarette and caused the tank to explode.

He was pronounced dead at the scene.

Police called the incident “completely innocent” in nature.