World·NewBritish armed forces intercepted a sanctioned Russian shadow fleet oil tanker in the Channel on Sunday, leading for the first time an operation to disrupt the oil revenue ​that helps fund Russia's war in Ukraine.British armed forces boarded and detained the vessel Smyrtos, in '1st U.K.-led operation of its kind'Thomson Reuters · Posted: Jun 14, 2026 8:22 AM EDT | Last Updated: 22 minutes agoListen to this articleEstimated 3 minutesThe audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results.British Prime Minister Keir Starmer welcomes Ukrainian President Volodymyr Zelenskiy at 10 Downing Street in London, last Sunday. (Isabel Infantes/Reuters)British armed forces intercepted a sanctioned Russian shadow fleet oil tanker in the English Channel on Sunday, leading for the first time an operation to disrupt the oil revenue ​that helps fund Russia's war in Ukraine.The vessel Smyrtos, sailing under a Cameroon flag, was boarded by Royal Marine Commandos and National Crime Agency (NCA) officials in the early hours on Sunday, with support from Chinook helicopters and other aircraft, a frigate and a minehunter."This successful operation delivers yet another blow to Russia and reminds those fuelling Putin's war in Ukraine that we will not let them hide," U.K. Prime Minister Keir Starmer said in a post on X.Video of the raid released by the government showed British commandos rappelling onto the vessel, while NCA officials were seen searching through documentation. The country’s Defence Ministry called the event "the first U.K.-led operation of its kind." CBC InvestigatesShadow fleets of sanctions-skirting ships facing global crackdown: analysisUkraine hits Russian oil-loading port, 'shadow fleet' tankersUkraine's President Volodymyr Zelenskyy wrote on X that he was grateful to Britain for the tanker's detention. Kyiv has been lobbying its allies to toughen enforcement against the shadow fleet, which it says funds Russia's war machine."Europe urgently needs to take legislative steps to enable not only the detention of tankers and restrictions on oil shipments, but also the confiscation of the oil they carry. This will certainly help bring peace closer," he said on X.The Russian embassy in London did not immediately respond to a request for comment.The tanker will be detained and monitored off the south coast of England as investigations continue, a government statement said. It added that the operation was conducted in close co-ordination with the French, who have previously intercepted a number of vessels linked to the "shadow fleet."The U.K. has sanctioned almost 600 Russian shadow fleet vessels to date, the government said.Until Sunday, Britain's involvement in efforts to stop the vessels had been limited to supporting French and U.S. operations. WATCH | The growing danger of ghost ships:Ghost fleet: How shadowy tankers move millions in illegal oilJanuary 18|Duration 8:03An epidemic of illegal ships are being used to smuggle sanctioned oil around the world. For The National, CBC’s Eli Glasner breaks down how this so-called 'ghost fleet' operates and the risk it poses.