Ukrainian President Volodymyr Zelenskiy said on Wednesday that North Korea was a de facto participant on Russia's side in its war against Ukraine.
In a speech to parliament, the Ukrainian leader said his intelligence services had confirmed North Korea's supply to Russia of both weapons and people.
"Our intelligence records not only the transfer of weapons from North Korea to Russia, but also the transfer of people," Zelenskiy told the parliament.
"These are workers for Russian factories to replace Russians killed in the war. And personnel for the Russian army. In fact, this is the participation of a second state in the war against Ukraine on the side of Russia."
On Sunday, Zelenskiy accused North Korea of transferring personnel to Russia's armed forces but the Kremlin has dismissed the allegation as "fake news."
White House National Security Council spokesperson Sean Savett said on Tuesday the involvement of North Korean troops in Ukraine, if true, would mark a significant increase in the North Korea-Russia defense relationship.
Washington says North Korea has supplied Russia with ballistic missiles and ammunition. Moscow and Pyongyang have denied arms transfers but have said they will boost military ties, possibly including joint drills.
The US Army's Indo-Pacific commander, General Charles Flynn, told an event in Washington that North Korean personnel being involved in the conflict would allow Pyongyang to get real-time feedback on its weapons, something that had not been possible in the past.
