NATO’s supreme allied commander in Europe, U.S. Air Force General Alexus Grynkewich, and his deputy are coordinating with allied defense chiefs after a series of attacks on commercial vessels in and around the Black Sea, including two incidents that occurred within Romanian territorial waters, alliance officials said on Thursday.
Colonel Martin O’Donnell, a spokesman for Supreme Headquarters Allied Powers Europe, said the consultations reflect standard procedures for addressing emerging threats. The incidents follow a pattern of suspected drone strikes targeting merchant ships near NATO’s southeastern flank, an escalation linked to the broader conflict in Ukraine.
NATO Secretary-General Mark Rutte confirmed on Thursday that he held discussions with the leaders of Romania and Bulgaria regarding Black Sea security and noted that the alliance has adjusted its military posture in the region. Romanian President Nicusor Dan stated that his government has requested additional allied support to safeguard navigation along the Danube River and in the Black Sea, emphasizing the need for equipment that can ensure the protection of a NATO member state.
The most recent attacks involved four commercial ships targeted between Wednesday night and early Thursday. Two of the vessels — the Marshall Islands-flagged bulk carrier Sea Destiny and the Comoros-flagged tanker Yara J — were struck while operating in Romanian waters. A third ship, the San Marino-flagged chemical tanker Wine Trader, was hit just outside Romania’s territorial boundary. The fourth, the Tanzanian-flagged tanker Dania J, was targeted in the Danube River near the Ukrainian port of Izmail, close to the Romanian border. Romanian authorities are conducting investigations into the first three incidents.
NATO has not identified the perpetrators or confirmed whether drones were used in all four attacks. The incidents occurred amid three separate drone incursions into Romanian airspace near the Ukrainian border, which prompted the mobilization of NATO fighter jets. Spanish F-18 Hornets based at Mihail Kogalniceanu Air Base and Romanian F-16s were deployed during overnight alerts on Wednesday and Thursday.
Bulgaria has announced plans to join a NATO-led counter-drone initiative by the end of October and to acquire additional equipment to strengthen its coastal defenses. The developments underscore growing concerns over the vulnerability of commercial shipping lanes in the region.

