Russia said on Sunday its forces had taken full control of a town in eastern Ukraine as they advance on the strategically important city of Pokrovsk and seek to pierce the Ukrainian defensive front lines.

Russian forces, which control about a fifth of Ukraine since invading in February 2022, are advancing in eastern Ukraine in an attempt to take the whole of the Donbas region, which is about half the size of the US state of Ohio.

Russia’s defence ministry said its forces had taken the town of Novohrodivka, which lies 12 km (7 miles) from Pokrovsk, an important rail and road hub for Ukrainian forces in the area. The town had a population of 14,000 before the war.

Yuri Podolyaka, an influential Ukrainian-born, pro-Russian military blogger, published maps showing Russian forces attacking beyond Novohrodivka in at least two places less than 7 km (4 miles) from Pokrovsk.

The General Staff of the Ukrainian military, in a report issued on Sunday evening, gave details of fighting throughout the Pokrovsk sector, including Novohrodivka. It said 29 attempted Russian advances had been repelled, with seven skirmishes continuing. “Our troops are taking measures to maintain designated positions,” it said.

But in an interview with a Ukrainian officer broadcast last week by US-funded Radio Liberty, he said Ukrainian forces had abandoned Novohrodivka on grounds that the positions there were not favourable for defending it.

Popular Ukrainian war blog DeepState said Russian forces had captured the village of Nevelske, to the southeast.

Reuters was unable to immediately verify battlefield reports from either side due to restrictions on reporting in the war.

Russian president Vladimir Putin said last week that a Ukrainian incursion into the Russian region of Kursk had failed to slow Russia’s own advance in eastern Ukraine and had weakened Kyiv’s defences along the front line in a boost to Moscow.

Ukraine’s top military commander said on Thursday that Kyiv’s incursion into the Kursk region was working. Russian forces, he said, had made no progress in their advance on Pokrovsk for the previous six days.

He said that one of the objectives of the Kursk incursion was to divert Russian forces from other areas, primarily Pokrovsk and Kurakhove. Russia had diverted large numbers to Kursk, but was also strengthening the Pokrovsk front, he added.

Ukrainian president Volodymyr Zelensky has said the Kursk operation was also to prevent Russian forces from crossing the border in the opposite direction.

Russia currently controls about 80 per cent of Donbas. Given the speed of recent Russian advances in the east, some Russian war bloggers have raised concern about the army overreaching itself.

Putin ordered tens of thousands of troops into Ukraine more than two and a half years ago in what he calls a special military operation. Ukraine and its Western backers have vowed to defeat Russian forces and expel all Russian troops.