"Among them are officers, sergeants, and privates from motorized rifle units, Marines, airborne troops, and other units, coming from various Russian regions and the occupied city of Sevastopol," the Airborne Assault Troops' press service said.

Overnight into January 10, the analytical project DeepState reported on a significant advance of russian troops in the Donetsk, Kursk and Kharkiv Regions,

The 67th Separate Mechanized Brigade repelled an assault of Russian troops near the village of Zhuravka in Sumy Oblast on the border with Russia's Kursk Oblast, according to the brigade's Jan. 15 statement.

Russia's Defense Ministry said its forces had retaken 63.2% of Ukrainian-held territory in the Kursk region of western Russia. Meanwhile, Germany's top diplomat has criticised the Berlin row over aid.