• French Navy intercepts tanker named Grinch, suspected of violating sanctions.
• Operation conducted in the Mediterranean with support from several allies, including the UK.
• President Macron states the shadow fleet aids Russia's war against Ukraine.
• Judicial investigation opened following the boarding of the vessel.
• Ukrainian President Zelensky praises the operation as a necessary step against Russian oil financing.

On January 22, the French Navy boarded a tanker named Grinch, which had set sail from Murmansk, Russia, and is suspected of violating international sanctions. French President Emmanuel Macron announced that the operation was conducted in the Mediterranean with the assistance of several allied nations and in strict compliance with the UN Convention on the Law of the Sea, emphasizing that "we will not tolerate any violation" and addressing the vessel’s suspected use of a false flag, which compounds the matter of its legality, according to Indiatimes, Le Monde, and Reuters.

The operation focused on curtailing the activities of what is termed a "shadow fleet," a network of vessels reportedly aiding Russia in circumventing international sanctions. UK Defence Minister John Healey confirmed that the UK provided tracking and monitoring support, reflecting a coordinated effort among allies to deter and disrupt vessels associated with this illicit trade. The tanker was subsequently diverted for further investigations, states Healey and Macron in various reports, as cited by Al Jazeera and Channel News Asia.

The French operation aligns with broader EU sanctions measures imposed against Russia due to its ongoing aggression in Ukraine. Macron articulated that such operations are essential to prevent financial resources from bolstering the war efforts, while Ukrainian President Zelensky commended the French action as a crucial step towards halting the flow of oil that finances military actions, noting, "This is exactly the kind of resolve needed," according to BBC and Al Jazeera.