U.K. police arrest captain of cargo ship on suspicion of manslaughter over North Sea collision

In this image taken from video provided by Denys Mezentsev, rescue crews work on site after a cargo ship was hit by a tanker carrying jet fuel for the U.S. military off eastern England, Monday, March 10, 2025, setting both vessels ablaze and sending fuel pouring into the North Sea. (Denys Mezentsev via AP)

LONDON — British police on Tuesday arrested the captain of a cargo ship on suspicion of manslaughter as they searched for answers about why it hit a tanker transporting jet fuel for the U.S. military off eastern England, setting both vessels ablaze. One sailor was presumed dead in the collision, which sparked fears of significant environmental damage.

Humberside Police said the 59-year-old was detained “on suspicion of gross negligence manslaughter in connection with the collision.” He wasn’t named by the police and has not been charged.

The owner of the container carrier, shipping company Ernst Russ, said the arrested man was the ship’s master. It said he “and our entire team are actively assisting with the investigations.”

The government said the cause of the collision was being investigated, but there was no indication of foul play.

U.K. officials were watching for damage to birds and sea life after jet fuel poured into the North Sea when the Portugal-registered Solong broadsided the U.S.-flagged tanker MV Stena Immaculate on Monday. The collision sparked explosions and fires that burned for more than 24 hours.

Footage filmed from a helicopter on Tuesday morning showed the fire appeared to largely be out on the tanker, which had a large gash on its port side.

The U.K. coast guard agency said Tuesday that the Solong was still alight. It said the cargo ship, whose front end was crushed and blackened, was drifting south, away from the tanker, and a 1 kilometer (around a 1/2 mile) exclusion zone had been put in place around both ships.

“No sign of pollution from vessels is observed at this time,” Transport Minister Mike Kane told lawmakers in the House of Commons.

The government said air quality readings were normal and the risk to public health onshore was “very low.”

Kane initially said the Solong was expected to sink, but the government said later that both vessels were likely to stay afloat.

The collision triggered a major rescue operation by lifeboats, coast guard aircraft and commercial vessels in the foggy North Sea.

All but one of the 37 crew members from the two vessels were brought safely ashore in the port of Grimsby, about 150 miles (240 kilometers) north of London, with no major injuries. One crew member was missing, and the coast guards called off the search late Monday.

“Our working assumption is that, very sadly, the sailor is deceased,” Kane said.

The U.K. Marine Accident Investigation Branch has begun gathering evidence of what caused the Solong, bound from Grangemouth, Scotland, to Rotterdam, Netherlands, to hit the stationary tanker, which was anchored about 10 miles (16 kilometers) off the English coast.

The investigation will be led by the U.S. and Portugal, the countries where the vessels are flagged.

The 183-meter (596-foot) Stena Immaculate was operating as part of the U.S. government’s Tanker Security Program, a group of commercial vessels that can be contracted to carry fuel for the military when needed. Its operator, U.S.-based maritime management firm Crowley, said that it was carrying 220,000 barrels of Jet-A1 fuel in 16 tanks, at least one of which was ruptured.

The company said it was unclear how much fuel had leaked into the sea.

The owner of the Solong said that contrary to earlier reports, the vessel wasn’t carrying containers of sodium cyanide, which can produce harmful gas when combined with water. It said that four empty containers had previously contained the chemical.

“Our team is actively engaged with all local authorities, and we will work with cleanup teams to ensure every effort is made to mitigate further impacts on the marine environment,” the company said in a statement.

Greenpeace U.K. said it was too early to assess the extent of any environmental damage from the collision, which took place near busy fishing grounds and major seabird colonies.

Environmentalists said that oil and chemicals posed a risk to sea life, including whales and dolphins and to birds, including puffins, gannets and guillemots that live on coastal cliffs.

Tom Webb, senior lecturer in marine ecology and conservation at the University of Sheffield, said that wildlife along that stretch of coast “is of immense biological, cultural and economic importance.”

Alex Lukyanov, who models oil spills at the University of Reading, said the environmental impact would depend on multiple factors, including “the size of the spill, weather conditions, sea currents, water waves, wind patterns and the type of oil involved.”

“This particular incident is troubling because it appears to involve persistent oil, which breaks up slowly in water,” he said. “The environmental toll could be severe.”

Jill Lawless, The Associated Press