Thousands of North Koreans are being sent to work in slave-like conditions in Russia to fill a huge labour shortage exacerbated by Russia's ongoing invasion of Ukraine, the BBC has learned.
Moscow has repeatedly turned to Pyongyang to help it fight the war, using its missiles, artillery shells and its soldiers.
Now, with many of Russia's men either killed or tied up fighting - or having fled the country - South Korean intelligence officials have told the BBC that Moscow is increasingly relying on North Korean labourers.
We interviewed six North Korean workers who have fled Russia since the start of the war, along with government officials, researchers and those helping to rescue the labourers.
They detailed how the men are subjected to "abysmal" working conditions, and how the North Korean authorities are tightening their control over the workers to stop them escaping.
