A dramatic sea drone explosion near Romania’s strategic Constanța port has raised fresh security concerns across NATO’s Black Sea frontier. Romanian authorities detected the unmanned vessel before it self-detonated close to shore, triggering evacuations but causing no casualties. Ukraine later confirmed it had lost control of one of its naval drones due to electronic warfare interference. The incident occurred just days after Ukrainian drones reportedly struck a Russian naval asset, fueling fears that the drone war is spreading closer to NATO territory. The blast has renewed questions about Black Sea security and regional escalation risks.