The developments underscore a growing battle at sea: Ukraine is hitting one of Russia’s most important Black Sea naval and export hubs, while Moscow is warning it could seize European vessels and flexing its naval power in the Pacific. Novorossiysk is a major Black Sea export hub and also serves as a base for Russian warships that Moscow relocated there after repeated Ukrainian attacks on its Black Sea Fleet in Crimea. Ukrainian President Volodymyr Zelenskyy claimed responsibility Wednesday morning for an operation targeting the Novorossiysk naval base, calling it "the last major stronghold of the Russian fleet in the Black Sea." The warning came against the backdrop of sweeping Russian naval exercises. Separately, Romania said its naval forces destroyed two suspected Russian Gerbera drones over the Black Sea, roughly 90 nautical miles from Constanta, according to East2West.