Ukrainian President Volodymyr Zelensky confirmed Monday more than 3,000 troops from North Korea have been killed so far fighting next to Russian forces.

Thousands of North Korean soldiers have died or been wounded according to Ukrainian President Zelenskyy. Reports are emerging that thousands of North Korean soldiers have been killed or wounded while fighting in the Ukraine war on Russia’s side.

North Korean soldiers fighting for Russia were given fake military documents with Russian names and birthplaces, the Ukrainian military said, amid claims from Kyiv that Russia is trying to conceal the presence of foreign fighters on the battlefield.