Ukraine has lost over 40 percent of the territory it previously gained in Russia's Kursk Oblast due to Russian counterattacks, Reuters reported on Nov. 23, citing a source in Ukraine's General Staff.

The Ukrainian source revealed that their forces initially controlled up to 1,376 square kilometres (531 square miles) of territory in Kursk but now hold around 800 square kilometres (309 square miles).

Ukraine has now lost more than 40% of the territory of Kursk Oblast, which it has controlled since August, as a result of Russian counterattacks, says a Reuters source in the General Staff of the Ukrainian Armed Forces.