Russian forces have reportedly entered Kostyantynivka, a strategically important city in eastern Ukraine’s Donbas region, and are attempting to encircle it. The incursion signals a potential shift in the ongoing conflict, with Ukrainian military sources suggesting the city’s fall may be imminent. Fighting is currently concentrated within the city limits, and the surrounding area is described as being under intense pressure. The capture of Kostyantynivka would represent a significant gain for Russia, potentially opening pathways for further advances into the Donbas. Ukrainian forces are reportedly preparing defensive positions, but face a challenging situation given the Russian advance. The situation remains fluid, and independent verification of claims from both sides is difficult.