OTTAWA -- Bystanders are being credited with helping a man who witnesses say lit himself on fire in an Ottawa raceway's parking lot.

The Good Samaritans tried to roll the man on the ground to put out the flames during the frightening incident Monday. Apr. 7, 2014 at the Rideau Carleton Raceway.

No details about the man have been released.

Paramedics say he was treated at the scene for second- and third-degree burns to more than 90 per cent of his body.

He then was airlifted to the burn unit at Sunnybrook Health Sciences Centre in Toronto where he's listed in critical condition.