A collision between the US-registered oil tanker Stena Immaculate and the Portuguese-flagged cargo ship Solong in the North Sea has left one crew member missing and fires still burning.

An environmental group in the U.K. says the North Sea tanker collision could become a "disaster in really important protected areas."

An arrest has been made after an explosive collision between an oil tanker and a cargo ship left a sailor presumed dead in the North Sea.The alarm was first raised on the Humber Estuary in East Yorkshire at 9.