Novorossiysk diesel-electric combat submarine of the Russian Black Sea Fleet has been under surveillance of the French Navy when it emerged in the Mediterranean Sea a few weeks ago.

The Novorossiysk has previously been deployed to the Mediterranean in support of Russian operations in Syria.

According to Russian Telegram channels, the submarine suffered serious technical failures that caused diesel to flood its interior. No official confirmation was made regarding this.
https://x.com/Gerashchenko_en/status/1977415809627513029