Russian forces have captured the village of Kostiantynivka in northern Sumy Oblast — not to be confused with the strategic town of the same name in Donetsk Oblast — and are intensifying multi-axis assaults toward Sumy City, according to Ukrainian and Western sources.

Expanding the northern frontline

According to the Institute for the Study of War (ISW) on 2 June, Russian troops are attempting to widen the northern Sumy Oblast frontline via three axes north and northeast of Sumy City. Geolocated footage confirmed recent Russian movements near Andriivka and Yablunivka. Russian milbloggers claimed that Oleksiivka, Novomykhailivka, and Kindrativka had been seized, with troops pushing into northern Andriivka, west of Yablunivka, and toward Kostyantynivka.

Elements of Russia’s 18th Motorized Rifle Division and 177th Naval Infantry Regiment are reportedly operating in the area, alongside airborne regiments from the 76th VDV Division. Military observer Kostyantyn Mashovets noted that the 752nd Regiment and 200th Brigade were recently redeployed from Lyman and Chasiv Yar to bolster forces in Sumy Oblast.

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Russia’s strategic goals near Sumy

ISW notes that Moscow aims to approach the Khotin-Khrapivshchyna line, roughly 12–15 km from Sumy, placing the city within tube artillery range. The reported use of drones and artillery strikes is likely part of preparations for a potential offensive on Sumy City. However, ISW assesses that Russian forces are unlikely to capture the city in the near term.

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DeepState and Suspilne confirm ground situation

Citing analysts of the Ukrainian group Deep State, monitoring the frontline situation, Suspilne reported that Russian forces occupied Volodymyrivka and Kostiantynivka and made advances in Oleksiivka, with portions still in a grey zone. Ukrainian Border Guard Service spokesman Andrii Demchenko identified Yunakivka and Khotin as key targets. He warned that if Russian forces manage to move artillery closer, threats to Sumy will intensify.

Military expert Pavlo Narozhny told Suspilne that the push toward Yunakivka aims to cut off Ukrainian supply lines from the Sumy-Yunakivka-Sudzha highway, which supports troops on the border and in Russia’s Kursk Oblast. Narozhny said Yunakivka offers intact infrastructure suitable for Russian consolidation and future advances.

Ukrainian positions under pressure from Russian “meat-wave assaults”

Fighting continues near Bilovody and Loknya, with attempted incursions into Yablunivka. Deep State co-founder Ruslan Mykula told Suspilne Russian forces were repelled in some villages but remain focused on isolating Yunakivka from the west.

Narozhny also described earlier attempts to sever logistics using drones near Novenke and claimed Russian forces now push through small villages like Volodymyrivka. He emphasized that their main objective remains Yunakivka, a staging ground for further operations toward Sumy.

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A combat medic anonymously told Suspilne that enemy drone and equipment superiority complicates evacuations and supply runs. A frontline sergeant described Russia’s tactic as “meat assaults,” sending successive small units using motorcycles and ATVs. Survivors regroup and continue advancing through tree lines and villages.

Threat level and troop presence

Narozhny estimated around 60,000 Russian troops are now deployed along the border, posing a significant but not yet critical threat. He said Ukraine must maintain 20,000–30,000 troops in the area due to the length of the frontline.

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Former intelligence chief Mykola Malomuzh stated that the current Russian grouping had earlier pushed Ukrainians from Kursk Oblast and now aims to secure new positions for potential strikes on Sumy. He said the “buffer zone” narrative masks broader offensive ambitions. Ukrainian defenses are reportedly holding due to well-fortified positions developed over time.

Narozhny also pointed to the forest between Yunakivka and Sumy as a major obstacle. He compared it to the Serebryanskyi forest in Luhansk Oblast, where Russian troops remain stalled after two years.

Russia occupies four empty border villages in Sumy Oblast

Territory under Russian control

As of 2 June, Russian troops controlled around 125 square kilometers of northern Sumy Oblast, with another 70 km² in the grey zone, according to Deep State. Villages under Russian control also include Novenke, Basivka, Veselivka, and Zhuravka.

Overnight on 3 June, DeepState reported that Russian forces had captured Kostiantynivka in Sumy Oblast. The status of Kindrativka, Vodolaha, and Oleksiivka remains under clarification. DeepState noted that “the situation continues to deteriorate due to constant enemy pressure and large infantry numbers,” adding that “after targeting enemy concentrations, new waves rush in so fast that our forces struggle to destroy them in time.”

Russia’s Sumy ambitions unlikely to succeed soon, says ISW

Related:

• Russian motorcycle units storm Ukrainian border villages seeking Sumy buffer zone in new offensive
• Russia tries to break through to northern Ukraine’s Sumy city amid ceasefire talks
• Russian drone blows up civilian shuttle bus, leaving nine dead in Sumy border town
• Russia bombs Sumy Oblast on first day of its own declared ceasefire

Russia advances step by step in Sumy Oblast. The invaders storm in on motorcycles and all-terrain vehicles, says Andrii Demchenko, spokesperson for Ukraine’s State Border Guard Service, Hromadske reports.

Moscow has intensified its use of small assault groups in the region, attempting to break deeper into the Ukrainian territory. Ukrainian defenders are engaged in daily battles, destroying Russian units. Moscow’s main objective is to gain a foothold and await reinforcements.

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Demchenko says Russian forces have expanded the area of activity for their small assault group tactics, especially around the villages of Basivka, Zhuravka, and, more recently, Veselivka and Volodymyrivka settlements.

The Russians are trying to penetrate deeper into our territory by using speed. These are constant Russian actions that we’ve been recording for several weeks now, he explains.

These groups often operate on foot or ride in on light vehicles. Once they cross into Ukrainian territory, they attempt to dig in and wait for reinforcements, with the goal of continuing the offensive with larger forces.

Russian sabotage and reconnaissance groups (SRGs) have been most active in northern Sumy Oblast, near the border with Chernihiv Oblast, and in the south, closer to Kharkiv Oblast. In the central part of the region, Russian forces continue to attempt to breach the border.

“Defense forces and border guards are destroying these groups both during attempted border crossings and troops before the line,” the Border Guard spokesperson adds.

Earlier, Ukrainian authorities reported that Russian forces seized four settlements in the northern region of Ukraine.

Hryhorov emphasized that residents of these villages had long been evacuated, stating there is no threat to civilians. The official did not specify when Russian forces took control of the settlements.

Late on 26 May, Oleh Hryhorov, head of the Sumy Oblast Military Administration, confirmed that Russian forces now control four settlements in the northern region of Ukraine. According to his Facebook post, the occupied locations include Novenke and Basivka of Yunakivka community, and Veselivka and Zhuravka in the Khotin community.

Hryhorov emphasized that residents of these villages had long been evacuated, stating there is no threat to civilians. The official did not specify when Russian forces took control of the settlements.

Fighting continues near the occupied zone

Hryhorov also reported ongoing clashes on the outskirts of Vodolahy, and near Volodymyrivka, Bilovody, Kostyantynivka, and Kindrativka in the Hotin community, as well as around Loknya in the Yunakivka community.

“The enemy continues attempts to advance in order to create a so-called ‘buffer zone’,” he wrote.

According to Hryhorov,

“The Ukrainian Defense Forces and all components of the defense system are keeping the situation under control, delivering precise fire strikes on the enemy. Our defenders are firmly repelling the enemy’s attacks and preventing further advances into Sumy Oblast.”

Territorial control estimates

The Ukrainian OSINT project DeepState, maintaining an interactive map of the war zone, estimates that the areas of 62.6 km² and 0.69 km² are currently under Russian occupation in the region, with an additional 36.98 km² marked as a gray zone where neither side maintains firm control.