Ukraine said Tuesday it had sunk a Russian patrol ship off the coast of occupied Crimea, claiming another victory over the Kremlin's forces in the hotly contested waters of the Black Sea. Moscow did not confirm the claim, which would represent the latest blow to its naval power as Kyiv strikes targets deep behind the war's front lines, even as its army suffers setbacks on the battlefield. Ukraine’s military intelligence agency said that it had used high-tech sea drones in an overnight attack on the large patrol ship Sergey Kotov near the Kerch Strait, which separates the annexed peninsula’s eastern...