Russia, which had bombarded the eastern city of Avdiivka for weeks, is now sending waves of troops toward the destroyed but strategically important spot in eastern Ukraine — and suffering terrible losses, Ukrainian senior officials and soldiers said Thursday.

“The fields are just littered with corpses,” Oleksandr, a deputy of a Ukrainian battalion in the 47th mechanized brigade, told Agence France-Presse.

“They are trying to exhaust our lines with constant waves of attacks,” he said. He declined to provide his full name for security reasons.

It is a strategy similar to the one Russia used against Bakhmut, a city it eventually captured.

Since mid-October, Russia has been trying to wrest the small city from Ukraine with no success, the Ukrainians say. The city sits on the front line 5 kilometers from Donetsk, the Russian-controlled capital of the region, one of four regions Moscow said it annexed from Ukraine.

Russia-backed separatists captured Avdiivka in 2014 and held it briefly before Ukrainian forces took it back and have been fortifying it ever since.

About 1,400 residents remain of the city’s prewar population of 32,000, said Vitaliy Barabash, head of Avdiivka’s military administration, who described the Russian onslaught as fierce.

“As regards the city, there is an average number of eight to 16 to 18 air attacks per day. Sometimes 30. We don’t have time to count them,” Barabash told Channel 24 television on Thursday. Russian reports on the war rarely mention Avdiivka.

Reuters could not independently verify battle reports from either side.

Earlier Thursday, four people were killed and five were wounded in Russian shelling in Ukraine’s southern region of Kherson on Thursday, Ukrainian officials said.

Ukrainian Interior Minister Ihor Klymenko said more than 60 residential and infrastructure buildings were damaged in the attack.

“It is preliminarily known that the shelling was carried out with cluster munitions,” Andriy Yermak, the head of Ukraine’s presidential office, said on Telegram. VOA could not independently verify that report.