French naval forces boarded the oil tanker Deliver in international waters off Sicily on 23 June, citing violations of maritime law and links to Russia’s so-called shadow fleet. The vessel, sailing from the Baltic port of Primorsk to Singapore under a Cameroonian flag, was escorted to a designated anchorage for further checks after French authorities raised doubts about the validity of its registration. President Emmanuel Macron announced the operation on 25 June, describing it as part of a European campaign to prevent the circumvention of Western sanctions imposed after Russia’s 2022 invasion of Ukraine.

French officials assert that the Deliver belongs to a network of hundreds of ageing tankers used by Moscow to export oil above the G7 price cap while obscuring ownership and insurance arrangements. The European Union has authorised member states to detain foreign-flagged vessels in the Mediterranean suspected of aiding sanctions evasion, and EU sanctions now target approximately 600 such ships. Moscow, through statements by President Vladimir Putin, has condemned these interceptions as “piracy” and a violation of international law, while Russian diplomatic sources argue that the detentions lack legal basis outside national jurisdictions.

The interception is the fifth by France since September 2025, following the boarding of the Grinch, Boracay, Deyna, and Tagor. In previous cases, vessels were released after operators paid fines—the Grinch was freed after a penalty of several million euros for failing to justify its flag—or after a period of detention. The Deliver’s fate remains uncertain pending the outcome of inspections, but the pattern suggests that while France is intensifying enforcement, it has so far stopped short of permanent seizure. The British navy conducted a similar operation in the English Channel in mid-June, signalling a coordinated Western effort to raise the operational costs for the shadow fleet.

Viewed from Brussels, the campaign reflects a strategic attempt to tighten the enforcement of oil sanctions without triggering a direct confrontation with Moscow. Western governments and maritime security analysts note that the shadow fleet poses not only a sanctions-evasion challenge but also significant environmental risks, as many vessels operate without standard international insurance. The French maritime prefecture has not yet indicated how long the Deliver will be held or whether charges will be brought. The dossier remains active, with further inspections expected to determine the vessel’s legal status and any potential penalties.