Black Sea shipping attacks have surged off the coasts of NATO members Romania and Bulgaria: the two sides hit 317 merchant and other vessels in the Black Sea and Sea of Azov between May and October, a more than fourfold rise on the 74 struck in the previous half-year, according to Tomas Alexa, a senior analyst at Ambrey Analytics, in Reuters' November 3 assessment. In October the balance of that shipping war swung sharply: Russia hit 38 vessels compared with 5 Ukrainian strikes, Ambrey said. After seven strikes on cargo ships near Romania and Bulgaria last month, NATO said it would deploy maritime patrol aircraft, radars and drones to bolster its eastern flank — and three days later, on October 23, another ship was struck just outside Romanian waters. Military analysts said they had little doubt the recent attacks near the two states were Russian, Reuters reported; Russia denies targeting Ukraine's neighbours with drones.
Which ships have been hit off Romania and Bulgaria?
At least nine cargo vessels in October alone, on Reuters' dated list. The Royad Mammadov was struck on October 5 south of the Romanian town of Sfantu Gheorghe; two crew members died. The Togo-flagged Alfa Watan sank after a drone hit on October 6 off Bulgaria's Byala, with 12 crew listed missing, and the Palau-flagged Able was struck in the same attack, with two people injured. On October 13 the Ukrainian-owned Chelsea 3 was hit by three drones off Bulgaria — all its crew rescued — and the HS Dignity sank off Krapets, with five crew rescued and 11 missing. The tanker Yara J was hit on October 14 inside Romanian territorial waters, southeast of Sulina; all its crew were rescued. The Khoryv capsized and sank on October 23 off Constanta, its crew rescued, and on October 28 the Greek-owned, Liberian-flagged Contship Jet was struck by three naval drones and later sank in Bulgaria's exclusive economic zone, en route to Constanta, its crew rescued. CNN, citing maritime tracking services and the Romanian and Bulgarian governments, put the human cost of the recent surge at at least 30 mariners killed or missing. Many of the ships hit in October were anchored near, or sailing to or from, the Romanian canal Ukraine uses for exports: one was in Romanian territorial waters, the other eight in Romania's or Bulgaria's exclusive economic zone, Reuters reported.
Are the attacks testing NATO?
That is the analysts' assessment, published here as assessment. "I think it's undeniably an escalation," said Sidharth Kaushal, a senior fellow at the London-based RUSI think-tank. Iulia Joja, director of the Black Sea programme at the Washington-based Middle East Institute, said Russia's attacks were taking into account the West's aversion to escalation: "This is about testing these red lines, with full awareness that we will do everything possible to take the most minimal measures." A naval drone seen on video of the last strike resembled a Russian variant, according to shipping security firm Ambrey, and Ambrey told CNN that "Romanian and Bulgarian waters should no longer be treated as safe by default". Bucharest has accused Russia of "systematic" strikes on civilian ships but stopped short of attributing individual attacks, citing the need for forensic evidence; Sofia has not blamed Russia, but said some of the attacks seem to benefit it. Russia denies targeting Ukraine's neighbours with drones and says European governments are the ones escalating the war by supplying military aid; Russia's defence ministry did not respond to a request for comment for the Reuters article. Bulgaria has asked NATO to deploy combat aircraft and anti-drone systems, according to Defence Minister Dimitar Stoyanov, CNN reported, and Romania has begun F-16 patrols along its coast, one of which shot down two Russian drones over Romanian territorial waters in late October. A NATO official told Reuters that Russian actions aimed at dissuading allies from supporting Ukraine were a serious security threat, and that the alliance's commitment to defending all its members was "ironclad".
What has the shipping war done to grain exports?
It has cut them by more than half on both sides. Russia exported just 0.3 million metric tons of grain in September through the Black Sea and Sea of Azov, down from 4.74 million metric tons in the same month last year, according to Russian export data seen by Reuters. Ukraine suspended operations at its Black Sea ports in late July due to Russian attacks, diverting volumes to river ports on the Danube and onwards through Romania's Sulina Canal — and even with that route, Ukraine's port exports of grain slumped to 0.81 million metric tons in September compared with 2.1 million in September last year, government data showed. Ukraine separately exported 1.09 million tons of wheat in September, half the 2.05 million tons a year earlier, according to government figures reported by CNN. Further reducing those volumes remains Russia's primary goal, with testing NATO the secondary objective, said Andriy Ryzhenko, a naval analyst and former senior Ukrainian naval officer. President Volodymyr Zelenskiy has sounded the alarm in those terms: "Everyone is talking about diesel and forgetting about grain. In a month or two, everyone will start talking about an agricultural crisis," he said last month.
Is a maritime ceasefire possible?
Turkey has proposed one; Russia has rejected the idea, on the reporting opened. Turkey's defence minister, whose country controls warship transit through the Bosphorus and Dardanelles under the Montreux Convention and is waiting for a response from Moscow and Kyiv on a narrow maritime ceasefire proposal, used last week's Sofia meeting of the three NATO littoral states to warn Russia and Ukraine against further attacks. Egypt, Turkey and India have pushed for maritime ceasefires, and US Secretary of State Marco Rubio said on Saturday there was growing international interest in a limited ceasefire. Russia has rejected a narrow maritime ceasefire that it says would provide respite to Kyiv. For Romania, the stakes are not only commercial: the Black Sea hosts its Neptun Deep offshore project, approached by a naval drone in August, which will make Romania the European Union's largest gas producer next year. A NATO official told Reuters the alliance had already committed to investing more than $40 billion in counter-drone capabilities over the next five years, and Joja said the limited availability of cheap interceptor weapons, exacerbated by the war in Iran, was a central problem for the West — which is why the shipping war's next month will be measured less in ships than in whether that money arrives as deployed defences off Constanta and Varna.
This analysis is drawn from Reuters' November 3, 2026 Black Sea assessment and its companion dated list of vessel strikes, both opened and read in full on reuters.com, and CNN's November 3, 2026 Black Sea report, opened and read in full on cnn.com. Analyst judgements are published as attributed assessments; the vessel list and crew outcomes are Reuters' list; the mariner toll is CNN's figure, attributed to maritime tracking services and the two governments; and Russia's denial is carried alongside the attribution reporting, per the two-source rule.
