Drone attack sinks cargo ship in Bulgaria's Black Sea waters; Zelensky blames Russia
On October 6, drones attacked two civilian cargo vessels in Bulgaria's exclusive economic zone in the Black Sea. One, ALFA WATAN, sank; the other, ABLE, caught fire and its 18 crew were evacuated onto a Bulgarian ferry. Ukrainian President Zelensky said the strike was a Russian combined attack using sea and aerial drones, the first known drone attack on ships in Bulgaria's economic zone.
Key points
- Drones attacked ALFA WATAN (flag of Togo) and ABLE (flag of Palau) in Bulgaria's exclusive economic zone on October 6, east of Cape St. Athanasius and the city of Byala.
- ALFA WATAN suffered critical structural damage and sank; ABLE caught fire after being struck.
- All 18 crew of ABLE were evacuated onto the Bulgarian ferry DIOSCURIA; some were wounded and received first aid on board.
- Romania's Ministry of Internal Affairs reported two killed and 11 rescued from the sunken ALFA WATAN; Bulgarian PM Radev initially reported the crew as missing while rescue operations continued.
- President Zelensky said the attack was a combined Russian strike using sea and aerial drones, and that Ukrainian Defense Forces conducted no operations in the area.
- The attack followed a similar drone strike the previous day that sank the Turkish vessel Royad Mammadov off Romania; Bulgarian PM Radev called the incident a gross violation of international law.
Why it matters
The strike marks the first known drone attack on merchant shipping inside a NATO member's waters and comes a day after a similar attack sank a Turkish grain carrier off Romania. Sinking a civilian cargo vessel and killing crew inside Bulgaria's economic zone sets a new threshold for attacks on merchant shipping in the western Black Sea and raises the political and security stakes for both Black Sea NATO members and the broader grain-export corridor. Zelensky's public attribution to Russia, and his framing of the incidents as an attempt to make the western Black Sea unfit for navigation, frames the attacks as part of an escalating pattern rather than isolated events.
What happened
On October 6, drones struck two civilian cargo ships operating in Bulgaria's exclusive economic zone in the Black Sea, east of Cape St. Athanasius and the town of Byala, approximately 130 km off the Bulgarian shore. ALFA WATAN (flying the flag of Togo) sustained critical structural damage and sank; ABLE (flying the flag of Palau) caught fire after being hit. Both vessels belonged to Turkish companies: ALFA WATAN was sailing from Egypt to Romania, ABLE was sailing from Romania to Istanbul carrying wheat. The 18 crew of ABLE — 11 Turkish citizens and 7 Indian citizens — were evacuated onto the Bulgarian ferry DIOSCURIA; two were wounded and were being transported to Varna by a Bulgarian Navy fast craft, with the remaining 16 taken to port by a border patrol boat. Bulgarian naval and air forces, joined by Romanian coast guard vessels and a helicopter, mounted a search-and-rescue operation at the site of the sunken vessel. DIOSCURIA located an overturned boat, three overturned rafts and life jackets but found no survivors from ALFA WATAN; Bulgarian PM Rumen Radev initially reported the crew as missing while the operation continued, while Romania's Ministry of Internal Affairs was cited as reporting two crew killed and 11 rescued from the sunken ship. Bulgarian PM Radev convened an emergency meeting with the ministries of defence, interior, transport, environment, the presidential administration and security services; President Iliana Iotova cancelled a visit to Veliko Tarnovo. PM Radev called the attack a gross violation of international law and an absolutely unacceptable assault in Bulgaria's EEZ, and said Bulgaria saw no grounds for invoking NATO Articles 4 and 5 because the incident occurred in a zone with special status. Crew of the attacked vessels confirmed that both sea and aerial drones were used. Ukrainian President Volodymyr Zelensky stated in an evening address that the attack was a combined Russian strike using sea and aerial drones, and that Ukrainian Defense Forces had not conducted any operations in the area. He said the Ukrainian Navy had contacted its Bulgarian counterparts to exchange information, instructed Ukrainian services to fully cooperate with partners on defence, and characterised Russia's aim as making the western Black Sea completely unfit for navigation. He linked the incident to a similar drone strike the previous day that sank the Turkish vessel Royad Mammadov off Romania and to repeated Russian drone incursions into Moldova. Bulgarian Defence Minister Dimitar Stoyanov said it could not yet be determined whether the drones were Ukrainian or Russian, and that confirmation required finding debris. European Commission President Ursula von der Leyen expressed concern and condemned the attack, noting it occurred the day after a similar incident near Romania. Neither Russia nor Ukraine had officially commented on the strikes at the time of reporting.
How Ukrainian sources describe it
Ukrainian-language coverage centers Zelensky's statement attributing the attack to Russia and emphasizing that Ukrainian Defence Forces conducted no operations in the area of the Black Sea where the two vessels were struck. Ukrainian sources foreground Zelensky's framing of the strike as part of Russia's effort to make the western Black Sea completely unfit for navigation, linking it to the previous day's sinking of the Royad Mammadov and to repeated Russian drone incursions into Moldova as a continuous pattern of escalation. Coverage also highlights Ukrainian institutional engagement: the Ukrainian Navy contacting its Bulgarian counterparts to exchange information on the incident, intelligence and special services investigating the available information, and Zelensky's instructions to the Armed Forces, the Ministry of Defence and other services to cooperate fully with partners to strengthen defence capabilities. Ukrainian Foreign Minister Andriy Sybiha is cited calling for strengthening Ukraine and limiting Russia's capacity for aggression, and warning that attacks on civilian shipping raise risks for sailors, raise trade costs and increase uncertainty over global food supplies.
How international sources describe it
The synthesis did not provide a separately framed international perspective distinct from the Ukrainian framing.
Where reporting differs
Sources name different identities for the Bulgarian Prime Minister responding to the incident: some refer to him as Rosen Zhelyazkov, while others name him as Rumen Radev. Sources also differ on the status of the ALFA WATAN's crew: Bulgarian PM Radev was reported as saying the crew were considered missing while rescue operations continued, while Romania's Ministry of Internal Affairs was cited as reporting two crew killed and 11 rescued. Attribution of responsibility for the strike also varies: Bulgarian Defence Minister Dimitar Stoyanov said it could not yet be determined whether the drones were Ukrainian or Russian, while Zelensky attributed the strike to Russia; Bulgarian media described the attack as coordinated and specifically directed at commercial vessels, and a Reuters source in maritime security assessed that Russia was probably responsible.
Background
On October 5, the day before the Bulgarian incident, the Turkish vessel Royad Mammadov, carrying grain from Ukraine to Italy, sank in the Black Sea off Romania's coast after a drone attack near the Pescăruș gas platform; Romania's Ministry of Internal Affairs reported two killed and 11 rescued, and Zelensky said the vessel had been struck by two Russian drones. All three vessels struck in this period — ALFA WATAN, ABLE and Royad Mammadov — are linked to Turkish companies, with ALFA WATAN and Royad Mammadov connected to the Istanbul-based Spring Marine Denizcilik and ABLE to Istanbul-based Ocean Eagle Shipping & Trading, according to Andriy Klymenko of the Institute of Black Sea Strategic Studies. According to Marine Traffic data, ALFA WATAN was traveling from Egypt to Romania and ABLE was traveling from Romania to Istanbul at the time of the attack. On October 1, Russian President Vladimir Putin had ruled out possible agreements on halting strikes despite concerns about global grain supply shortages. Zelensky also linked the incident to repeated Russian drone incursions into Moldovan territory. European Commission President Ursula von der Leyen expressed concern over the attack in Bulgaria's EEZ.