The collision has raised fears of an explosion or environmental catastrophe, with rescue teams racing to the scene.
The ships involved are the U.S.-flagged tanker MV Stena Immaculate and the Portugal-flagged container ship Solong.
A cargo ship collided with a tanker carrying jet fuel for the US military off eastern England on Monday, setting both vessels ablaze and sending fuel pouring into the North Sea.
Fires are still burning on an oil tanker carrying jet fuel and a cargo ship which was loaded with highly toxic chemicals ...