Drone Strikes Threaten Black Sea Shipping

On October 7, 2026, two merchant ships were struck by aerial drones off Bulgaria’s coast, one of which sank. The Bulgarian prime minister, Rumen Radev, reported that a Ukraine-owned vessel was hit by three drones and that a second ship was damaged before sinking. He said he would summon the Russian ambassador, calling the attacks “unacceptable.” The incident follows a similar drone strike reported on October 6, 2026, about 130 km from the same coastline, which Radev also described as “absolutely unacceptable.”

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Prime Minister Radev announced the intent to summon Russia’s ambassador but did not assign blame pending investigation. Romanian Foreign Minister Oana-Silvia Toiu labeled the October 7 incident a “flagrant violation of international law.” Ukrainian President Volodymyr Zelenskyy asserted that a Turkish-owned cargo ship carrying Ukrainian grain, which caught fire and sank off Romania, had been attacked by Russian drones, resulting in two fatalities. European Commission President Ursula von der Leyen condemned both attacks, stating that attacks on civilian shipping are unacceptable and that the situation in the Black Sea is increasingly concerning.

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The attacks occur amid heightened scrutiny of Europe’s capacity to safeguard maritime routes in the Black Sea, more than a year after the EU launched a strategy to strengthen regional security. The October 6 strike marked the first of two consecutive drone incidents within a week, underscoring a rapid escalation.

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• Two ships hit by drones on October 7.

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• One vessel sank; the other sustained damage.

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• Two crew members died on the Turkish-owned cargo ship that later sank.

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• The earlier October 6 attack involved a single merchant vessel.

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These incidents have amplified concerns about the vulnerability of civilian shipping to unmanned aerial threats in the Black Sea. Officials from Bulgaria, Romania, Ukraine, and the European Commission have called for stronger protective measures, highlighting the strategic importance of the Bosporus corridor for oil tankers and cargo ships transiting to the Mediterranean. The ongoing investigations and diplomatic responses suggest that regional actors may seek coordinated security actions to deter further drone assaults.

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