Ukraine's president says North Korean forces have returned to the front line in Russia's western Kursk region, after reports they were withdrawn last month due to heavy casualties.
In a video address on Friday, Volodymyr Zelensky said the Russian army had "brought back in North Korean soldiers" who were carrying out "new assaults" in the region partially occupied by Ukraine.
He added "hundreds of Russian and North Korean military" personnel had been "destroyed".
In January, Western officials told the BBC they believed at least 1,000 of the 11,000 troops sent from North Korea had been killed in the past three months. North Korea and Russia have not commented.
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