"During the Kursk operation, the enemy has already lost 38,000 of their soldiers in this direction alone, with nearly 15,000 of these losses being irreversible," Zelenskiy said in his nightly video address.

Ukraine's president told podcaster Lex Fridman that 3,800 North Koreans had been killed or wounded fighting alongside Russia but many more could come.

"Russian and North Korean military leaders are treating these troops as expendable," a senior White House official said.

Russian and North Korean forces suffered “significant” losses in intense fighting in Russia’s southern Kursk region, Ukrainian president Volodymyr Zelensky has said. Speaking during his nightly video address on Saturday,