Aerial footage shows damage after a cargo ship collided with a U.S. tanker off the coast of England. (Credit: Reuters)

A port official said he was told the North Sea collision produced "a massive fireball" and the cargo ship's owner said one crew member was missing.

A cargo ship carrying a toxic chemical hit a tanker carrying jet fuel for the U.S. military off England, setting both vessels on fire and sending fuel pouring into the North Sea.