Recent drone strikes on merchant vessels in the Black Sea, including incidents in Romanian and Bulgarian exclusive economic zones during early and mid-October 2026, have intensified focus on Russian naval activity amid the ongoing conflict with Ukraine. Bulgarian Prime Minister Rumen Radev summoned Russia's ambassador after multiple ships, such as the Alfa Watan and HS Dignity, were hit by suspected aerial and sea drones, resulting in sinkings, fatalities, and missing crew; officials noted outcomes that align with Russian interests while stopping short of direct attribution. NATO held emergency discussions with affected members, and additional attacks targeted grain carriers and tankers near Danube approaches. These developments, alongside Russia's reported strikes on Ukrainian ports and infrastructure, shape trader assessments of further Russian actions against shipping. Diplomatic efforts by Turkey for maritime de-escalation and potential NATO surveillance enhancements remain key near-term factors.