Ukraine war briefing: Ukrainians sink Russian submarine and blow up airbase – officials The GuardianRussian Attack Submarine Sunk in Missile Strike on Black Sea Port Claims Ukraine USNI NewsIt’s Possible A Ukrainian Missile Blew Up Russia’s ‘Rostov-On-Don’ Submarine—For The Second Time In 11 Months ForbesUkraine accuses Russian forces of killing, dismembering prisoner-of-war ReutersRussian Black Sea Fleet Submarine Destroyed in Crimea Strike Newsweek