This aerial picture taken on October 1, 2025, off the coast of the western French port of Saint-Nazaire shows the tanker Boracay from Russia's so-called "shadow fleet" suspected of being involved in drone flights over Denmark which sailed off the Danish coast between September 22 and 25. DAMIEN MEYER / AFP

The French navy was on board a tanker from Russia's "shadow fleet" stationed off the western coast of France on Wednesday, October 1, according to Agence France-Presse (AFP) journalists on the scene, after data showed it was off the Danish coast last month during mysterious drone flights.

The Boracay, a Benin-flagged vessel blacklisted by the European Union for being part of Russia's sanction-busting "shadow fleet" of ageing oil tankers, was stationed off Denmark from September 22 to 25, according to ship tracking data analysed by AFP. Drones have been sighted across Denmark, including over military sites, since September 22, prompting brief closures at several airports and a ban on all civilian drone flights until Friday.

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Denmark is unsettled by a wave of drone incursions