(OKLAHOMA CITY) — The maker of Tasers said Monday that at least 15 people have caught fire, and five have died, after being stunned while near flammable materials, similar to an Oklahoma man who was burned beyond recognition after he was shocked and reportedly got into his gasoline-soaked van.

Axon spokesman Steve Tuttle said the deaths include the man shocked Nov. 7 by a police officer in the town of Lindsey, about 45 miles (72 kilometers) south of Oklahoma City, although authorities say they are still investigating whether the man may have lit himself on fire.