Russia's Defense Ministry reported that Ukraine lost up to 400 of its forces during the past day, in its offensive against Russia's western region of Kursk. 

In addition to the 400 troops, the Ukrainian Armed Forces lost three tanks, three infantry fighting vehicles, one armored fighting vehicle, 14 motor vehicles, four artillery systems, one mortar, 13 FPV drone teams, and one air defense radar, the statement further added. 

Over the past day, Russian forces reportedly successfully repelled three Ukrainian counterattacks along the Kursk border, dealing significant damage to enemy personnel and equipment across 11 border settlements and in the Sumy region, bringing Ukraine's total losses in the Kursk region since August to over 45,220. 

Ukraine's ability to maintain control over seized territory in Russia's Kursk region is likely limited to several months, a Bloomberg report said Friday, citing unnamed US officials as heightened tensions signal potential Russian countermeasures.

US sources suggested that Ukrainian troops might be able to hold the territory only until spring, should Russia initiate a concentrated effort to reclaim the region. Such an operation could begin as early as January, they indicated.

One official noted that Kiev's objectives in the Kursk incursion were primarily symbolic, aimed at shocking Russia and dispersing its forces. A potential Ukrainian retreat, they argued, could still be framed as a strategic achievement.

Read more: Ukraine's military campaign 'derailed', forces 'ground down': Russia