Deadly drone strikes in NATO waters raise stakes for Black Sea trade

As the Ukraine war spills over into the Black Sea, European security and commercial risks are intensifying. Five commercial vessels have been targeted by drones in Bulgarian and Romanian waters in the past week, resulting in at least four deaths, several missing sailors and injuries. Bulgaria, Romania and Turkey have brought the matter to NATO, requesting heightened focus on the region and joint support, according to two alliance diplomats.

Bulgarian Prime Minister Rumen Radev described the attacks as "absolutely unacceptable" and a "serious breach of maritime and international law."

Russia has been attacking Ukrainian ports and cities in the region since the onset of its full-scale invasion. However, these recent strikes have pushed the issue into NATO territory. If the attacks persist, EU leaders will need to prioritize protecting Black Sea shipping and ensuring Ukrainian trade remains uninterrupted. This issue is expected to dominate Thursday's European Council summit.

The Black Sea situation is fraught with danger, as attacks can originate from both Russian and Ukrainian forces. Ukraine has also employed naval drones against Russian-linked shipping. In June, a Ukrainian sea drone detonated in Romania's Constanța port after reportedly veering off course due to Russian electronic interference.

While Russia and Ukraine are likely to continue their drone operations as long as they can afford it, addressing the security risks and restoring freedom of navigation in the Black Sea remains a pressing concern. A serious diplomatic initiative involving Ukraine, Russia and a neutral third party, such as Turkey, is needed to restore open and secure sea lanes. This effort could help alleviate the pressure on grain routes, which are already strained as Ukraine's harvests head to market.