Key Takeaways:
- The US has seized a Russian-flagged oil tanker, Marinera, in the Atlantic Ocean over alleged sanctions violations.
- The operation is the first known US military seizure of a Russian-flagged vessel in recent history and could risk confrontation with the Kremlin.
- The US Coast Guard has also intercepted another dark-fleet tanker, M Sophia, in the Caribbean.
- The seizure is part of a broader effort by the US to enforce sanctions on Venezuela-linked oil vessels.
- The Kremlin has demanded the humane and dignified treatment of Russian citizens onboard the Marinera and their swift return to Russia.
Introduction to the Seizure
The US has carried out a high-stakes operation in the Atlantic Ocean, seizing a Russian-flagged oil tanker, Marinera, over alleged sanctions violations. The seizure, which is the first known US military seizure of a Russian-flagged vessel in recent history, has the potential to risk confrontation with the Kremlin. According to US European Command, the operation was carried out on Wednesday, bringing to an end a dramatic two-week pursuit that began in the Caribbean and concluded in the Atlantic.
Background of the Operation
The Marinera had been navigating in the Atlantic between Iceland and the UK, according to ship-tracking data from MarineTraffic. The vessel had been attempting to evade a US blockade targeting sanction-hit oil tankers operating near Venezuelan waters. The pursuit of the Marinera began after it turned back into the Atlantic while travelling from Iran to Venezuela. The US Coast Guard said on Wednesday that it had separately intercepted another dark-fleet tanker, the M Sophia, in a pre-dawn operation in the Caribbean. The White House has signalled that it will continue to seize Venezuela-linked oil vessels after Donald Trump last month imposed what he described as a “complete blockade” on ships transporting oil for Caracas.
International Reaction
The Kremlin’s immediate reaction to the seizure has been notably muted, with Moscow appearing to continue its efforts to improve ties with Washington under President Trump in the hope of securing his favour in talks over Ukraine. Russia’s transport ministry said in a statement that US forces had boarded the vessel outside the territorial waters of any state and that contact with it had been lost. The ministry cited the 1982 UN convention on the law of the sea, which says “no state has the right to use force against vessels duly registered in the jurisdictions of other states”. The US defence secretary, Pete Hegseth, wrote on X: “The blockade of sanctioned and illicit Venezuelan oil remains in FULL EFFECT – anywhere in the world.”
Implications of the Seizure
The operation is likely to strain relations with Vladimir Putin, coming at a sensitive moment as negotiations over a potential peace deal in Ukraine continue and after the US capture of Venezuela’s president, Nicolás Maduro, a longstanding Kremlin ally. The vessel is part of the so-called shadow fleet moving oil for Russia, Iran, and Venezuela. It was placed under sanctions by the US in 2024 over allegations it carried illicit cargo for a Hezbollah-owned company. Initial reports suggest the ageing tanker is empty, having been en route to pick up Venezuelan oil before changing course. Even so, Moscow appears to have gone to considerable lengths to protect the vessel, raising questions about why it is willing to risk a standoff with the west over it.
Military Involvement
The Wall Street Journal reported late on Tuesday that the Russian navy had deployed a submarine to escort the tanker, heightening the stakes of any confrontation in the North Atlantic. In the 24 hours preceding the operation, multiple western surveillance flights were observed over the vessel, including aircraft from US bases in Iceland, and RAF Rivet Joint and P-8 Poseidon planes from the UK, which are capable of detecting submarines. Britain provided support to the US in its operation, the Ministry of Defence said in a statement. The US Coast Guard said that several helicopters and at least one coastguard vessel were used to take control of the tanker.
History of the Vessel
The Marinera had a history of attempting to evade US blockades. In December, the crew repelled an attempted US boarding near Venezuelan waters. The vessel was subsequently renamed from Bella 1 to Marinera, a Russian flag was painted on its hull, and it was added to Russia’s official shipping registry. Moscow later lodged a formal diplomatic protest demanding that Washington halt its pursuit. The tanker departed the Gulf of Oman in November, transiting the Suez canal and the strait of Gibraltar before crossing the Atlantic in early December. As US pressure on Venezuela intensified – culminating in the capture of Maduro – the vessel stopped abruptly near the Caribbean on 15 December and reversed course, heading back towards Europe.
Future Implications
The decision to reflag the vessel under Russian jurisdiction shortly before its seizure has placed Moscow in an extremely awkward position. Mikhail Zvinchuk, an influential military blogger with close ties to Russia’s defence ministry, said the move “sets a precedent for further operations against Russia’s so-called shadow fleet, not only in the Atlantic but in other regions of the world as well”. Registry data reviewed by the New York Times showed that at least three other oil tankers that had operated in Venezuelan waters in recent weeks had since been reflagged under the Russian banner, pointing to a growing trend of Moscow extending its registry to vessels facing US sanctions. The move could complicate relations between Moscow and Washington at a time when Trump has shown frustration with Putin over Russia’s continued fighting in Ukraine.