Explosion on Chinese highway may have been caused by natural gas truck

Dash cam video recorded Sunday in China shows a dramatic explosion which may have been caused by a natural gas truck.

Footage shows a car backing up on an expressway in north China just moments before a huge ball of fire ignites at least two nearby cars and several trees on the shoulder.

Firefighters said the blaze may have come from a truck that had been leaking natural gas. Two people in that truck were hospitalized for burns, while three vehicles close to the truck were damaged, according to NBC affiliate KPRC-TV in Houston.