French Commandos Board & Seize 4th Russian 'Shadow Fleet' Vessel Since September

France announced Monday another weekend interdiction of a Russian "shadow fleet" vessel in international waters near its coast. The French Navy boarded and detained a sanctioned oil tanker, President Emmanuel Macron announced Monday, in an operation which had the assistance from the UK Royal Navy and other allies.

This marks the fourth time since September that French commandoes have intercepted a boarded a sanctioned Russian vessel in regional waters.

The vessel, identified as the Tagor, originated from Murmansk, Russia, and was taken by French authorities while it traversed around 400 nautical miles (740 km) west of the tip of Brittany.

"It is unacceptable for ships to circumvent international sanctions, violate the law of the sea and fund the war that Russia has been waging against Ukraine for more than 4 years," Macron wrote in a post on X.

The apparent legal justification France's navy has relied on for such actions is the practice of "flag-hopping" - which involves a crew repeatedly changing displayed flags, along with often invalid registrations to thwart international tracking monitors.

At the time of boarding, via soldiers rappelling from helicopter, the ship was falsely flying a Cameroonian flag while reportedly en route to the coastal African city of Limbe, Cameroon.

Macron confirmed further on X: "This operation took place in the Atlantic Ocean, on the high seas, with the support of several partners, including the United Kingdom, in strict compliance with the law of the sea."

The Kremlin again condemned such 'unlawful' seizures in international waters, with spokesman Dmitry Peskov saying, "We consider these acts as illegal, they border on international piracy … Russia is taking measures to ensure the safety of its cargo."

The vessel's captain is a Russian citizen, according to an embassy disclosure from Paris. According to more:

Guillaume Le Rasle, a spokesperson for the prefecture, said the tanker was under EU and US sanctions. “It is a vessel that was known and tracked,” he told AFP.

“The decision to divert it was taken Sunday evening. The objective of the diversion is to verify the validity of its flag,” Le Rasle said, adding that the tanker, which has frequently changed flags, was “almost empty” at the time of boarding.

La Marine nationale a arraisonné hier matin un nouveau pétrolier sous sanctions internationales en provenance de Russie : le Tagor. Notre détermination est constante et totale.

Cette intervention a été effectuée en Atlantique, en haute mer,… pic.twitter.com/zxEslYjbUE

— Emmanuel Macron (@EmmanuelMacron) June 1, 2026

The last several seized tankers were also flying flags of African nations, and these interdictions have stretched back through last year. In some instances, Russia has been sending military escorts - which of course has seen French and European militaries hold off executing any action.