Upstate New York Gas Station Explodes in Massive Inferno

Investigators are trying to determine what sparked the incident.
1:21 | 06/17/16

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Transcript for Upstate New York Gas Station Explodes in Massive Inferno
Next tonight, the mystery explosion at the gas station. A car bursting into flames in Rochester, New York. The blast throwing the driving to the ground, setting his clothes on fire. And ABC's linsey Davis tonight on what may have sparked the explosion. Reporter: An investigation tonight into what caused this massive explosion at this upstate New York gas station. Watch again. Just seconds after this man fills a gas container and puts it into his car, something creates a spark. The container explodes and a massive fireball engulfs the car. Igor pataco drops to the ground and rolls to try to extinguish the flames. What do you think most likely happened here? The flammable vapors built up in the car and static electricity probably caused a spark and there was an explosion. And it could be just taking off a sweater, opening up the car door, going through the car. Reporter: The 44-year-old suffered second and third-degree burns to 30% of his body. Some tips to try to prevent such a calamity? Keep the can on the ground and with the nozzle in contact with the can during the entire filling process, to avoid igni igniting vapors from static electricity. And don't overfill it. Leave room in the container for expansion of the gas. Firefighters say the man did exactly the right thing by stopping, dropping and rolling. He remains in the hospital tonight in guarded condition with non-life threatening injuries. David? Linsey, thank you. When we come back here

This transcript has been automatically generated and may not be 100% accurate.

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