Drone Strikes Hit Merchant Ships Off Bulgaria's Black Sea Coast

Two merchant ships were hit by unknown drones off Bulgaria's Black Sea coast on Tuesday. One vessel sank. Eleven crew members are missing and 20 people were rescued in total. Bulgarian Prime Minister Rumen Radev blamed Russia and summoned the Russian ambassador. He provided no public evidence for the attribution.

This is the second such incident in six days in the same area. The attacks occurred in international waters near the Bulgarian coast. Rescue operations involved Bulgarian authorities and other responders. The ships were commercial vessels. Details on their flags, cargo, and exact ownership have not been fully released by authorities.

Radev's statement marks a direct accusation against Moscow. Relations between Bulgaria and Russia have been strained since the full-scale invasion of Ukraine. Bulgaria is a NATO and European Union member. Previous incidents in the Black Sea have involved mines, drones, and other threats linked to the wider conflict. Shipping companies have adjusted routes and insurance costs in response to repeated risks.

The Bulgarian government has increased maritime patrols in the area. The Russian embassy has not issued a detailed public response as of Tuesday evening. Similar drone strikes on commercial shipping have occurred in other theaters, including the Red Sea and the Persian Gulf, where attribution is often contested. In the Black Sea, Ukraine has used naval drones against Russian targets, while Russia has targeted Ukrainian ports and grain exports.

The missing crew members are the immediate human concern. Search efforts continued into the evening. The rescued sailors received medical attention. Authorities have not named the vessels or released crew nationalities. The sinking of one ship creates an environmental and navigational hazard that will require later assessment once the area is secured.

Commercial traffic through the western Black Sea has faced elevated risks for years. Grain shipments from Ukraine have used alternative corridors. Insurance premiums for vessels operating near the conflict zone remain high. The latest strikes add another data point to the pattern of attacks on non-military shipping. Whether the drones were launched from sea, air, or shore remains under investigation.

Bulgarian officials have called for greater NATO attention to the Black Sea security environment. The alliance has conducted exercises and increased presence in the region. The direct naming of Russia by the prime minister raises the diplomatic stakes. Summoning an ambassador is a standard step when a government seeks explanations or registers protest. The lack of publicly presented evidence leaves the attribution open to later verification or dispute.

For shipping operators, the practical result is another reminder of the hazards in the area. Companies may reroute vessels or require additional security measures. The incident also affects local economies that depend on Black Sea trade. Ports in Bulgaria and neighboring countries monitor such events closely for impacts on traffic and safety protocols.

Investigators will examine wreckage, debris, and any recovered drone parts if available. Electronic warfare and radar data from the region may help establish the origin of the attacks. Until more information is released, the confirmed facts remain the two strikes, the sinking, the missing crew, the rescues, and the Bulgarian government's public accusation against Russia.