https://www.thebarentsobserver.com/security/the-ukrainians-destroyed-one-yesterday-another-six-improved-kiloclass-subs-will-come-to-russias-northern-fleet/442343
Dec 16, 2025 - With an underwater drone, the Ukrainian Security Service destroyed an Improved Kilo-class (Varshavyanka) sub in the port of Novorossiisk. A fleet of six subs...
the ukrainianskilo classdestroyedoneyesterday