The French Navy and the United Kingdom intercepted and boarded the Russian oil tanker Tagor in the Atlantic Ocean on Sunday, May 31. President Emmanuel Macron announced the operation on Monday, confirming the vessel belongs to Russia’s “shadow fleet” used to circumvent international sanctions on crude oil.
The boarding occurred more than 400 nautical miles west of Brittany. The Tagor sailed from Murmansk under the flag of Madagascar; officials suspect the vessel used a “false flag” to obscure its Russian origin.
President Macron confirmed the detention via social media, framing the operation as a necessary step against the sanctioned oil trade. The operation follows a directive from UK Prime Minister Keir Starmer, who authorized commandos earlier this year to board shadow fleet vessels in UK waters or associated zones to halt funding for the war in Ukraine.
The Tagor is part of Russia’s “shadow fleet,” a network of aging tankers with opaque ownership designed to bypass G7 price caps and international sanctions. These vessels often operate without standard insurance or transparency, posing environmental risks to Atlantic shipping lanes.
The joint operation underscores a coordinated effort between the French Navy and the United Kingdom to move from passive monitoring to active physical interception of sanctioned Russian assets on the high seas.
French and British authorities are holding the Tagor for further inspection to verify its cargo and documentation. This operation is part of a broader G7 effort to tighten enforcement of price caps and sanctions on Russian oil, targeting the shadow fleet’s ability to maintain opaque ownership and insurance structures to evade international law.