Most of the jet fuel onboard the U.S.-flagged tanker Stena Immaculate that was hit by a container ship in a collision off Britain's coast remains contained and only two of the vessel's 18 fuel tanks have leaked,

The captain of the Solong cargo ship who was arrested after crashing into an oil tanker off the coast of England is a Russian national, the ship’s owner Ernst Russ said Wednesday.

The U.S.-flagged tanker Stena Immaculate collided with the Portuguese-flagged Solong container ship, resulting in the leakage of jet fuel. Two of the ship's 18 fuel tanks have leaked, but the majority of the fuel remains contained.

U.K. police say the Solong cargo ship's captain, identified by the vessel's owner as a Russian national, was detained on suspicion of negligent manslaughter.

A Portuguese container ship has collided with a U.S.-flagged oil tanker while the tanker was anchored in the North Sea, with both ships catching on fire, officials said.