Ukraine’s domestic security service, the SBU, said it struck a Russian submarine in the Black Sea port of Novorossiysk, Russia, disabling it, in a first attack of its kind. Russia acknowledged the attack but said no ships or submarines were damaged.

Dec. 15 (UPI) -- Ukraine's Security Service said it has struck and disabled a Russian submarine using an underwater drone at the Black Sea port Novorossiysk, Russia.

Ukraine has claimed to have blown up a Russian submarine using underwater drones for the first time.

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 underwater drones struck and disabled a Russian Kilo-class attack submarine in the Russian navy's most important remaining Black Sea base, in the first operation of its kind, Ukrainian officials said on Monday.

Ukraine's drones hit the submarine in the port of ‍Novorossiysk where Russia has rebased many naval vessels. Read more at straitstimes.com. Read more at straitstimes.com.

President Volodymyr Zelenskyy says Ukraine’s ability to strike back at Russia gives it leverage in peace talks.

Ukraine's internal security agency said the attack damaged and disabled a Russian Kilo-class submarine in the port city of Novorossiysk.