Russia said on Monday it had downed nine Ukrainian drones that tried to attack part of the infrastructure of the TurkStream gas pipeline, through which Russian gas flows to Turkey and Europe, and called the attack an "act of energy terrorism".

Ukrainian fighters "eliminated" a group of Russian troops in an ambush, Kyiv's GUR military intelligence agency said.

Russian strikes against Ukraine killed one civilian and injured 17 over the past day, regional authorities reported on Jan. 13. Russian forces launched 110 drones at Ukraine overnight from the directions of Millerovo,

A North Korean-made mobile surface-to-air missile system has appeared for the first time in the Ukraine conflict. A previously unidentified air defense system seen in the footage of a strike released by the Russian side appears to be a North Korean analog of the Russian Tor short-range SAM system.

North Korean troops have been deployed to bolster Russian forces in the Kursk border region with Ukraine, where they are gaining battlefield experience despite initial heavy losses.