A 59-year-old man has been arrested on suspicion of gross negligence manslaughter in connection with the collision in the North Sea, police have said.
Humberside Police have begun a criminal investigation into the cause of the collision and are working in collaboration with the Maritime and Coastguard Agency.
Senior Investigating Officer, Detective Chief Superintendent Craig Nicholson said: “The man arrested remains in custody at this time whilst enquiries are underway, and we continue speaking with all those involved to establish the full circumstances of the incident.”
It comes as Maritime minister Mike Kane said the fire on the MV Stena Immaculate was caused by its cargo of 220,000 barrels of jet fuel
Speaking in the House of Commons, Mr Kane said that while all members of the Stena Immaculate crew were safe and accounted for, 13 of the 14 sailors on the Solong were rescued with the working assumption one was deceased.
He confirmed that the fire on the Stena Immaculate had been extinguished, but the Solong remained alight and had drifted off in the night.
The crash, which occurred just before 9.50 am on Monday, involved the US-registered Stena Immaculate, transporting fuel for the US military, and the Portuguese-flagged Solong.