Ukraine’s domestic security service, the SBU, said Monday that it struck a Russian submarine in the Black Sea port of Novorossiysk, causing critical damage to the vessel and effectively disabling it.

As it tries to demonstrate its continuing ability to fight, Ukraine said it had used drones to inflict serious damage on a Russian Kilo-class submarine at a Black Sea port.

Ukrainian President Volodymyr Zelenskyy said Russia had sent over 450 drones and 30 missiles into Ukraine overnight.

Hello, this is Francis Farrell reporting from Kyiv on day 1,391 of Russia's full-scale invasion of Ukraine. Today's top stories: ・'Any format of Donbas under Russian control is unacceptable' — Ukraine hails 'real progress' but holds firm on territory after Berlin talks ・‘No need to hold referendums’ — Amid US pressure,

By Yuliia Dysa and Tom Balmforth KYIV, Dec 15 (Reuters) - Ukraine said on Monday it hit and disabled a Russian missile-carrying submarine docked at a Black Sea naval base using underwater sea drones for the first time,

Russia is now arming its drones with Soviet-era air-to-air missiles to hunt Ukrainian aircraft, Kyiv said.

Ukraine claimed to have successfully targeted a Russian submarine in Novorossiysk using underwater drones, marking a potentially significant development in naval warfare.

Russia launched a huge attack on Ukraine overnight as the country marked Armed Forces Day on Saturday, Ukraine's air force said.

Ukrainian drone attack in southwestern Russia killed two people as parts of Ukraine went without power after Russian assaults on energy sites hours before peace talks were to restart in Germany.

Russian Deputy Foreign Minister Sergey Ryabkov told ABC News during an exclusive interview in Moscow on Monday that he believes the warring parties are close to a deal.