Ukraine's Defense Forces advanced more than 15 km through underground utility tunnels into Russia's rear on the Kupiansk axis in Kharkiv Oblast, the Khartiia Corps of Ukraine's National Guard reported on 22 October. The corps called it Operation Veles. The underground advance was paired with attacks on the surface and drone strikes, hitting Russian forces from two directions, the corps told Militarnyi.
Russian troops have repeatedly crawled through gas pipelines around Kupiansk to get behind Ukrainian lines, even after Ukraine reported confident control of the city in February. This time, Ukraine went underground itself. The operation took away Russia's chance to get into Kupiansk's rear, the corps said.
The corps reported more than 30 Russian soldiers captured and Russian losses of more than 100. Militarnyi, citing the unit, put the number of Russian troops killed at over 100.
Khartiia studied how Russian troops moved through pipes before going underground itself, the corps commander, Brigadier General Ihor Obolenskyi, said.
"We watched how the enemy works underground and studied how they do it. The Russians intended to use gas pipelines to get into the rear of our troops. So we went underground ourselves. We anticipated the enemy's actions and mastered the tactics of underground combat," he said.
Boots under ground!
— Khartiia Corps in English (@khartiia_eng) October 22, 2026
Asymmetric breakthrough in the Kharkiv Region: Khartiia Corps conducts the subterranean counteroffensive Operation VELES, advancing 15 km underground.
Corps Commander General Ihor Obolenskyi explains a unique operation. pic.twitter.com/qRQ93kckpK
For the operation, troops trained physically and psychologically to fight in confined spaces, sappers and engineers prepared the underground route, and special communications, navigation, silent logistics, and life-support systems were put in place, Khartiia told Militarnyi. The operation was named after Veles, the Slavic pagan god of the underworld.
Khartiia's brigade, the R.U.H. assault regiment, the Lava drone regiment, the Achilles drone brigade, and units of Ukraine's military intelligence, including the Freedom of Russia Legion and the Russian Volunteer Corps, took part, the corps said.
By September 2025, Russian forces had used pipelines to move troops behind Ukrainian lines three times, Ukrainian monitoring project DeepState reported on 12 September 2025. The first was in Avdiivka, the second near Sudzha, and the third near Kupiansk, where groups crossed the Oskil River through a gas pipe.
Near Sudzha in March 2025, Russian special forces walked through a pipeline that until recently had carried Russian gas to Europe, the Associated Press reported. A pro-Kremlin blogger claimed they covered about 15 km and that some spent several days inside.
Russian troops kept using the pipeline near Kupiansk this year. On 27 September, Khartiia's reconnaissance drones recorded Russian forces leading nine civilians, including children, elderly people, and a person on crutches, through the gas pipeline out of the Kupiansk community. Men of military age in civilian clothes walked alongside them, and the corps believes they were Russian soldiers using the group as cover to withdraw. Ukrainian troops held fire because of the civilians, the corps said, adding that the case has been documented for a war crimes investigation.
Drones, constant surveillance, and AI-assisted targeting have made the battlefield surface transparent and deadly, argue John Spencer, chair of urban warfare studies at West Point's Modern War Institute, and Col. Drew Craig, principal military engineering staff officer at NATO's Allied Rapid Reaction Corps. In an August analysis, they write that soldiers in Ukraine describe a "death zone" of some 30 km, where moving above ground can draw an attack within minutes. When firepower makes the surface too dangerous, armies have historically gone underground, as they did in World War I and Vietnam, and more recently in Gaza and Lebanon.
"Armies that cannot survive above ground must adapt below it," the authors write.
Fighting in tunnels brings its own requirements, the authors write: detecting the enemy by sound and vibration, and specialized unmanned systems that cannot rely on GPS or stable radio links. Long stretches underground also take a severe psychological and physical toll on soldiers.
Western militaries are not ready for this, Spencer and Craig write. No NATO partner maintains even general capabilities for large-scale underground warfare, and US and British efforts focused mainly on detecting and clearing tunnels rather than occupying and operating in them.
Russian drones struck a 24-story apartment building in Kyiv, a university building in Kremenchuk, warehouses, and hypermarkets overnight on 21 October, killing two people in the capital and an elderly couple near Kharkiv, Ukrainian officials said. The attack went well beyond Ukraine’s power grid, hitting places where people live, study, and shop. Over the past day, Russian strikes also killed three more civilians and injured dozens across several oblasts.
Russia has kept up nightly drone and missile attacks on Ukrainian cities through the autumn, mostly aimed at the energy system. It struck Ukraine’s energy 76 times during a US-declared truce, and fired 39 ballistic missiles at the grid three days after Washington announced it. This time the targets also included homes, a university, warehouses, and shops.
Overnight, Russia launched 186 Shahed-type and other attack drones, 88 of them jet-powered, along with Iskander-K cruise missiles, Ukraine’s Air Force said. Air defenses downed or jammed 150 drones. Hits were recorded at 27 locations, and debris fell at 13 more.
A drone hit a 24-story residential building in Kyiv’s Sviatoshynskyi district at the level of the 20th floor, starting a fire, Mayor Vitali Klitschko said. The fire spread over about 70 square meters, and rescuers found the bodies of two people while clearing debris, the State Emergency Service said. Two people were injured and hospitalized, Klitschko said, including a 46-year-old man who was walking past the building, according to the police.
In the Desnianskyi district, seven parked cars caught fire, the State Emergency Service said; police put the number at about 10. The evening before, drones hit a warehouse building in Desnianskyi and a transport facility in Solomianskyi district.
In the village of Korotych near Kharkiv, Russian drones killed an 81-year-old woman and an 83-year-old man, Kharkiv Oblast Governor Oleh Syniehubov said. Rescuers recovered their bodies from the rubble of their house, the State Emergency Service said. Eleven people, including a two-month-old boy and an eight-year-old girl, were treated for acute stress, and 13 houses were damaged.
In Kremenchuk, a drone hit a building of the Mykhailo Ostrohradskyi National University, setting it on fire, the State Emergency Service said. Three people were injured, including a 16-year-old who was hospitalized with a concussion, Poltava Oblast Governor Vitalii Diakivnych said. In the Poltava community, drones damaged an administrative building and warehouses.
In Lviv Oblast, an attack set fire to an enterprise in a village in Lviv district and injured two people, while a house was damaged in a neighboring village, the State Emergency Service said. In Uman, drones hit a hypermarket and damaged a hotel, injuring one person, Cherkasy Oblast Governor Ihor Taburets said.
On the evening of 20 October, a drone hit an Epicentr hypermarket in Pervomaisk, Mykolaiv Oblast, injuring eight people, acting Governor Heorhii Reshetilov said. Russia also struck a hypermarket in Rivne Oblast several times that day, injuring four and forcing rescuers to pull back while they fought the fire, the State Emergency Service said.
The overnight strikes followed a day of attacks. In Kyiv, Russian strikes on 20 October killed one person and injured 21, three of them seriously, Klitschko said. An administrative building caught fire, rescuers freed four people trapped on its upper floors, and a healthcare facility was damaged, the State Emergency Service said. In Dnipropetrovsk Oblast, two men were killed and seven people injured that day, regional officials said.
In Kharkiv Oblast, Russian attacks over the past day injured 11 more people in Kharkiv, Derhachi, and Shestakove, Syniehubov said. In Kherson Oblast, 13 people were injured, three of them children, the regional administration reported. In the Chernihiv region, an 89-year-old woman and a young woman were hurt in strikes on villages and on Novhorod-Siverskyi, Governor Viacheslav Chaus said, and a 21-year-old woman was injured in the Sumy community, according to the Sumy regional administration.
More than 5,000 subscribers lost power in Volyn Oblast’s Lutsk district, Governor Roman Romaniuk said. In Ternopil Oblast’s Kremenets district, 7,949 subscribers remained without power after earlier Russian strikes on energy facilities, the regional administration reported.
Six people were killed in a Russian strike in the settlement of Nova Vodolaha in Kharkiv Oblast, including girls aged 1 and 11. Another 15 people were injured, including seven children, Kharkiv Oblast Governor Oleh Syniehubov said on 20 October. Russian forces struck a park with a drone while families with children were there, Ukraine’s Minister of Internal Affairs Ivan Vyhivskyi said.
Russian forces continue to attack Ukrainian cities, killing civilians and destroying civilian infrastructure. The Kharkiv Oblast Prosecutor’s Office has opened a war-crime investigation into the strike. The strike was aimed at people, Yurii Yurchenko, head of a police department in Kharkiv Oblast, said in a comment to Suspilne.
The Russian drone circled the park several times before crashing, Yurchenko said. He said the drone struck a tree near a café, and the blast wave and shrapnel hit people at the establishment. The attack came at around 16:30, the prosecutor’s office said, adding that Russian forces had preliminarily used a Geran-3 drone.
The Russian strike killed three women, aged 28, 34 and 36, a man around 40 years old, and two girls, aged 14 months and 11 years, Syniehubov said in his statement.
The youngest girl, named Anhelina, was born in August 2025, Ukrainian President Volodymyr Zelenskyy said. Her mother, Inna, died in the hospital, he added.
Zelenskyy met with US Senators Richard Blumenthal and Thom Tillis, along with their colleagues from both parties and both chambers of Congress, according to a 19 October post on his social media accounts. During the meeting, he discussed the Russian attack in Kharkiv Oblast and showed lawmakers photographs from the scene, including one of the infant who was killed in a stroller.
“This is how Russia responds to the lifting of sanctions and the easing of pressure,” he said in the post.
Zelenskyy said Ukraine needs air defense and that no one should think about making money with Russia while it continues its war. He asked that sanctions on Russia stay in place until the killing stops, urged the US to “be strong” and apply Lindsey Graham’s law, and called on Europe to keep supporting Ukraine.
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