The captain of the Solong cargo ship who was arrested after crashing into an oil tanker off the English coast is a Russian national, the vessel’s owner said Wednesday, as maritime experts search for answers.

LONDON (AP) — The captain of a cargo ship that collided with a U.S. tanker is a Russian national who remains in U.K. police custody, the vessel’s owner said Wednesday, as it emerged that the ship failed several safety checks last year.

A camera onboard a nearby vessel has captured the moment a cargo ship crashed into a tanker carrying jet fuel for the US military. Monday's collision in the North Sea set both vessels on fire and sent fuel pouring into the waters off eastern England.