In the port of Novorossiysk, Russia, Sub Sea Baby underwater drones of the Security Service of Ukraine (SBU) for the first time in history struck a Russian Project 636.3 Varshavyanka class submarine (NATO designation: Kilo).

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.

At the time of the attack, the Kilo-class submarine was docked in a Russian Black Sea port near the city of Novorossiysk and carried four launchers for Kalibr cruise missiles, which Moscow regularly u...