Russian troops are trying to drag Radkivka, a village on the northern edge of Kupiansk in Kharkiv Oblast, into the gray zone so their infiltration groups can keep reaching the city, Viktor Trehubov, spokesperson for Ukraine’s Joint Forces Grouping, said on national television on 27 October, Ukrinform reported. Russian forces made three attempts to advance toward Radkivka on 26 October, Ukraine’s General Staff reported.

Russia has tried for more than a year to retake Kupiansk, a city on the Oskil River, largely by slipping small groups through a disused gas pipeline under the river. They kept using it even after Ukraine said in September 2025 that it had flooded three of the four pipe strings, until Ukrainian troops went into the pipes themselves in Operation Veles, announced on 22 October.

Russian groups now have to move above ground

The pipe Russian groups used to seep toward Kupiansk has been put out of action, so they now have to go through Radkivka or neighboring Holubivka, Trehubov said. They move along the bank of the Oskil and a nearby tree line, but the foliage will soon be gone, which will make that much harder.

On the western bank of the Oskil, Russian forces took losses from Ukraine’s Khartiia Corps and in Operation Veles, and their logistics have “suffered noticeably,” Trehubov said. Advancing there is now harder for them than it was a month ago, he added.

Everything now depends on how the fights for Holubivka and Radkivka end, Trehubov said.

“If Ukrainian control can finally be established there, the Russians will have nowhere much to crawl through,” he said.

Several dozen Russian soldiers remain in low-rise buildings in northern Kupiansk, and Ukrainian forces are working to cut off their rotations, Trehubov said on 23 October.

Each side wants the other off its bank of the Oskil

On the eastern bank, Russian forces keep pushing toward the village of Podoly and Kupiansk-Vuzlovyi, a railway junction town southeast of Kupiansk, aiming to wipe out Ukraine’s foothold there, Trehubov said. Ukraine wants to destroy the Russian foothold on the western bank.

“For that, we will need to at least somehow throw them out of Dvorichna,” Trehubov said, referring to a town north of Kupiansk.

The US-based Institute for the Study of War (ISW) assessed that Russian forces conducted no offensive operations on the Kupiansk axis on 26 October, likely because Ukraine now controls the pipeline, a view at odds with the General Staff’s report for that day.

Ukraine reported confident control of Kupiansk as early as February, yet Russian groups kept slipping into the city for months afterward. Trehubov’s latest assessment stops short of declaring that threat over: Russia will still try to advance, he said.

Ukraine's Khartiia Corps has accused Russian forces of using civilians as human shields and then shelling them near a gas pipeline in Kupiansk, Kharkiv Oblast, on 13 October. The group included two women, a child, and several men, according to the Ukrainian military unit.

Khartiia warned that Russian media could use footage of the incident to accuse Ukrainian forces of attacking civilians. The corps said the shelling came from Russian-held territory and described the incident as a deliberate provocation.

The corps said Russian troops led the civilians toward the Shebelinka–Ostrogozhsk gas pipeline before the group came under repeated mortar and artillery fire. Aerial reconnaissance footage recorded casualties among the civilians, the unit said.

Khartiia says Russian forces fired from occupied side of Oskil River

According to Khartiia, Ukrainian forces did not open fire on the group. 

The corps said an analysis of the explosions indicated that the shelling came from the eastern bank of the Oskil River, from territory held by Russian forces.

The unit described the incident as a deliberate provocation, warning that Russian media could use footage from the scene to falsely accuse Ukraine of attacking civilians.

Evidence to be submitted for war crimes investigation

Khartiia said it would submit the collected materials for investigation into potential war crimes.

The corps did not provide a confirmed number of civilian casualties or further details about the condition of those shown in the reconnaissance footage.

The allegations have not been independently verified.