Ukrainian Forces Face Encirclement Risk as Russia Cuts Kostiantynivka Supply Lines
Russian troops have entered northern districts around Kostiantynivka after taking its eastern sector, putting Ukrainian supply routes to the embattled Donetsk city at risk. The advance, backed by heavy bombardment that is turning the settlement into ruins, could force a Ukrainian withdrawal and reshape the local front line.
Russian forces are tightening the noose around Kostiantynivka in eastern Ukraine, pushing from multiple directions and cutting key supply routes in a move that could force Kyiv into another difficult withdrawal. Ukrainian‑aligned mapping project DeepState and other battlefield observers reported on 16 June that Moscow’s troops have seized the eastern part of the city and advanced into northern districts, threatening to encircle remaining defenders.
According to these accounts, Russian infantry are pressing Kostiantynivka from the east via Novodmytrivka and from the Berestok and Illinivka areas to the north and northwest. The goal, they say, is to reach the narrow northern “neck” of the city and sever land supply lines feeding Ukrainian units in central and southern sectors. At the same time, a separate report claimed Ukrainian forces are withdrawing from the eastern sector after Russian troops entered the northern neighborhoods of Novoselivka and Chervonyi, effectively cutting off overland resupply to parts of Kostiantynivka.
The city is under intense bombardment. Observers describe heavy artillery and air strikes pounding residential and industrial areas alike, with much of the settlement being reduced to ruins in the process. For the civilians who have stayed, the human cost is immediate: homes destroyed, basic services disrupted, and escape routes narrowing as the front line creeps closer. For Ukrainian soldiers holding the remaining blocks, the advance raises the grim prospect of being cut off if they stay, or ceding yet another devastated city if they pull back.
Kostiantynivka sits on a web of roads feeding Ukrainian positions deeper in Donetsk region, and its loss would complicate the defense of surrounding settlements. Russia’s push there fits a broader pattern of grinding, attritional advances aimed at collapsing one urban strongpoint after another rather than staging dramatic breakthroughs. Each time Kyiv withdraws from a city under this pressure, it preserves troops but loses terrain, infrastructure, and another shield for major hubs further west.
The battle is unfolding against the backdrop of renewed Western support pledges. At the G7 summit in France, Ukrainian President Volodymyr Zelensky pressed leaders for more air defense systems, additional Patriot missiles, and expanded defense production to blunt exactly the kind of air and artillery barrages now pulverizing Kostiantynivka. New UK decisions on support and sanctions against Russia’s shadow fleet were also announced after his meeting with Prime Minister Keir Starmer, part of an effort to choke off the revenues that sustain Moscow’s offensive.
For Ukraine’s military, the immediate challenge is tactical: how long to hold ruined urban positions at rising cost, and when to trade ground for preserving combat power. For Russia, the push on Kostiantynivka is both a local bid to straighten and secure its front line and a political signal that it can still take territory despite Western aid. Every captured settlement, no matter how shattered, can be presented domestically as proof of momentum.
Urban fights like this also shape the medium‑term trajectory of the war by chewing through units on both sides. If Russia secures Kostiantynivka, it will gain a forward base for further operations, but at the cost of manpower and equipment that might otherwise be used for larger offensives. If Ukraine can inflict enough attrition while executing an orderly withdrawal, it may trade space now to stabilize a more defensible line later.
The next indicators to watch are whether Ukrainian commanders publicly acknowledge a withdrawal or redeployment from Kostiantynivka, whether Russian forces can fully secure the city’s northern approaches, and how quickly the front line stabilizes to the west. Any sign that Russia is able to exploit the capture by rolling on to neighboring settlements, rather than pausing to regroup, will show how much offensive capacity it has retained after months of incremental gains.
Sources
- OSINT