Ukraine's Foreign Ministry warns journalists against accepting Russia's offer, citing the 2014 Ilovaisk massacre where Moscow promised safe passage through a "humanitarian corridor" before opening fire, killing 366 Ukrainian soldiers who trusted similar Russian guarantees.
A gas pipeline once used by Russian forces to sneak under Kupiansk was flooded by Ukrainian units, blocking underwater infiltration and forcing the enemy into exposed crossings.
Moscow has publicly acknowledged that seizing Kupyansk would serve as the launching point for simultaneous advances toward Chuhuiv, Izyum, and Vovchansk
Russian troops are attempting to complete encirclement and have created a "kill zone" around the Pokrovsk city, where any movement or resupply by Ukrainian troops is targeted by drones and artillery
The Russian military is transferring specialized infiltration tactics across different front sectors, with forces near Kupiansk replicating underground pipeline advances previously used in Avdiivka and Sudzha