SVO News, December 15, 2025, Avia.pro. The Security Service of Ukraine (SBU) reported another attack, allegedly targeting the Russian 636.3-class submarine Varshavyanka in the port of Novorossiysk. According to the SBU, the submarine was allegedly blown up using Sub Sea Baby underwater drones, which allegedly caused critical damage and disabled the submarine.

The video released in connection with this event raises serious questions and doubts, including the veracity of the data regarding the damage and the circumstances of the alleged attack, which requires thorough verification by independent sources.

There have been no official comments from the Russian side yet, and the SBU's statements are being viewed with disbelief until the facts are confirmed.