French Navy, backed by UK, seizes Russian shadow-fleet tanker Tagor in Atlantic; Kremlin cries 'piracy'

The interception

French naval commandos rappelled from a helicopter onto the deck of the oil tanker Tagor on Sunday, seizing the vessel roughly 400 nautical miles (over 740 kilometers) west of the Brittany peninsula. President Emmanuel Macron announced the operation on Monday via X, posting a video of the boarding. The ship had departed Murmansk on 30 May, bound for Limbe, Cameroon, and was flying a flag that French authorities quickly determined was likely false.

It is unacceptable that boats skirt international sanctions, violate the law of the sea and finance the war that Russia has been waging for more than 4 years against Ukraine.

The Brest public prosecutor, Stéphane Kellenberger, stated that the Russian captain repeatedly refused to comply with French orders, forcing authorities to take control of the vessel. A criminal investigation has been opened for failure to display a proper flag and refusal to obey orders. The 23-member crew was escorted by the French Navy to an anchorage for further inspection.

British role

A UK Ministry of Defence spokesperson confirmed that a helicopter operating from the frigate HMS Somerset provided support during the operation. British Prime Minister Keir Starmer had announced in March that UK forces were authorized to board sanctioned Russian vessels. However, a BBC Verify analysis found that nearly 200 shadow-fleet ships transited British waters between Starmer's announcement and 11 May.

Together with our allies, we are stepping up our efforts against shadow fleet vessels to cut off funding for Putin's criminal invasion of Ukraine.

The shadow fleet

Russia is believed to operate hundreds of aging tankers to evade Western sanctions on oil exports, which are critical to financing the war in Ukraine without triggering domestic inflation or a currency collapse. The Tagor is the fourth vessel suspected of belonging to this shadow fleet that France has intercepted since September 2025. Previous interceptions include the Boracay in September, the Grinch in January 2026, and the Deyna in March 2026. The Grinch was released in February after paying a multimillion-euro fine, and France announced in April that it would double penalties for flag violations.

Kremlin reaction

Kremlin spokesman Dmitry Peskov called the operation illegal and said it bordered on international piracy. He added that Russia is taking measures to ensure the safety of the tanker's cargo. The Russian embassy in Paris confirmed that the captain is a Russian citizen and has requested information from French authorities about the fate of Russian nationals on board.

We consider such actions illegal; they border on international piracy. We categorically disagree that they are carried out in full compliance with international law.

Environmental and legal stakes

Macron emphasized that vessels flouting basic maritime rules also pose a threat to the environment and public safety. The Tagor had changed flags multiple times, having previously flown those of Madagascar and Cameroon, and is reportedly linked to Iranian oil magnate Mohammad Hossein Shamkhani, according to Opensanctions.org. The boarding was conducted under the Montego Bay Convention on the Law of the Sea, which permits inspection of vessels suspected of flying a false flag.