KYIV, UKRAINE -- Ukrainian officials claimed Friday they used a barrage of drones to destroy at least six military aircraft and badly damage eight others at an airfield in Russiaās Rostov region. Russian defence officials, however, claimed they intercepted 44 Ukrainian drones and that only a power substation was damaged in the attack.
The Associated Press could not independently verify either sideās claims.
The assault appeared to be one of Kyiv's biggest air attacks in the war, coming as its forces stepped up their assaults on Russian soil. Russia has also escalated attacks on civilian infrastructure, including Ukraineās power plants, in recent weeks, signalling a new and potentially dangerous phase in the conflict as both sides struggle to achieve significant advances on the ground.
The overnight attack targeted a military airfield near Morozovsk in Russia and was conducted by Ukraineās Security Service in cooperation with the army, Ukrainian intelligence officials told the AP.
They said around 20 members of the airfieldās personnel were killed or injured. Morozovsk airfield was used by Russian bombers that have been launching guided aerial bombs at Ukraineās cities and frontline positions, the officials said.
They spoke on condition of anonymity because they were not authorized to publicly discuss the operation.
If true, the attack would be among Ukraine's most successful cross-border strikes. Last October, Ukraine claimed it destroyed nine Russian helicopters at two airfields in Russian-occupied regions using long-range ballistic missiles donated by the United States.
Last August, Ukrainian media, citing unidentified intelligence sources, claimed that drone attacks hit parked Russian bomber aircraft at air bases deep inside Russia.
In a conflicting version of events, Russiaās Defence Ministry said a total of 44 drones were āintercepted and destroyedā in the Morozovsky district, more than 100 kilometres (60 miles) from the border. The attack damaged a power substation, Rostov Gov. Vasily Golubev said, adding that eight people near the airfield were injured.
Usually well-informed Russian military bloggers confirmed an attempted attack by Ukrainian drones on a military air base in Morozovsk but claimed there were no casualties at the base and no damage to warplanes.
The Russian defence ministry said nine more drones were intercepted over the border regions of Kursk, Belgorod, Krasnodar and the nearby Saratov region, bringing the total of attack drones deployed by Ukraine overnight to 53.
Drone warfare is a key feature of the war, which has extended into a third year since Russiaās full-scale invasion of its neighbour. On the 1,000-kilometre (600-mile) front line, where fighting is largely bogged down, low-cost drones are used by both sides to knock out expensive military hardware.
The Kremlinās forces have used large numbers of Iranian-designed Shahed drones to bombard urban areas of Ukraine. Kyiv, in turn, has developed a small but fast-growing defence industry where drones, including deadly unmanned sea vessels, are proving effective.
Russian authorities have long accused Ukraine of launching regular drone attacks on power plants, oil refineries and other targets in western regions of Russia near the border. Last month, Ukraine fired a barrage of 35 drones at such targets, Russia said. Some attacks have reached deep into Russia, including Moscow and as far as 1,200 kilometres (745 miles) east of Ukraine.
Ukraine cannot match the scale of Russiaās military, however. Last week, Moscow launched a mass barrage of 99 drones and missiles against Ukraineās energy infrastructure, hitting regions across the country.
Meanwhile, Ukraineās air force said it intercepted 13 Russian drones launched overnight at the southern regions of Odesa, Zaporizhzhia and Dnipropetrovsk, but five missiles got through. Authorities did not report any casualties.
Ukrainian President Volodymyr Zelenskyy said he held a meeting with his top brass focused on the production of attack drones and the manufacture of electronic warfare equipment to intercept incoming drones.
He said late Thursday that the meeting put together āclear written agreements with manufacturers, clear financing and clear delivery deadlines.ā
Authorities will next turn to ārobust and increasingā missile production, he said, as military support from Western partners falls short of what Kyiv hoped for.
Zelenskyy said an assessment of frontline positions found that Ukraine has āmanaged to stabilize our positionsā despite being outgunned and outnumbered by the Russian army.