Ukrainian soldiers are now using a long-range drone capable of traveling up to 2,000 kilometers (1,242 miles) and carrying a 250-kilogram air bomb, the Unmanned Systems Forces said on Jan. 31. The drone is described as a “unique development” and a potential game changer on the battlefield.

Russia and Ukraine exchanged large drone attacks on Sunday night into Monday, with alleged Ukrainian UAVs forcing flight restrictions at three Russian airports.

Ukraine carried out a drone strike on targets in Russia's Tver region, according to Kyiv intelligence sources.

"This refinery is one of the 10 largest oil refineries in Russia in terms of design capacity and is involved in supplying the Russian occupatying army," the General Staff said in a statement.