Ukraine’s domestic security service, the SBU, said Monday that it struck a Russian submarine in the Black Sea port of Novorossiysk, causing critical damage to the vessel and effectively disabling it.

Ukraine claimed it carried out an underwater drone strike on Dec. 15, the first such attack in maritime warfare, that critically damaged a Russian Kilo-class attack submarine at the Russian port of Novorossiysk,

Ukraine has used long-range drones to attack Russian oil platforms as it expands its strikes on the country's energy sector.

The Slavneft-Yanos oil refinery in Russia's Yaroslavl Oblast (250 km from Moscow), which was hit by a Ukrainian drone attack on Friday 12 December, has halted fuel production. Source: Reuters, citing industry sources Details: According to the sources,

Turkey's indigenous Unmanned Combat Aerial Vehicle (UCAV), the Bayraktar Akinci, demonstrated new precision-strike capabilities during live-fire tests, successfully deploying the BOZOK and KAYI‑30 smart munitions, according to the country's top drone manufacturer, Baykar.

By Yuliia Dysa and Max Hunder KYIV, Dec 12 (Reuters) - Russia attacked two Ukrainian ports on Friday, damaging three Turkish-owned vessels including a ship carrying food supplies, Ukrainian officials and one ship owner said,

Drones attacked the Russian city of Yaroslavl, located north-east of Moscow, more than 700 kilometres from the state border with Ukraine, on the night of 11-12 December. The strike caused a fire at the local oil refinery.

Former Swedish Foreign Minister Tobias Billström said after the Ukraine war, Europe must be ready for further Russian aggression.