Thousands of North Korean workers are being sent to Russia to fill labor shortages caused by the Ukraine war, according to the BBC. With many Russian men fighting or unavailable, Moscow relies heavily on these workers, who face harsh, almost slave-like conditions. They work long hours on construction sites, live in overcrowded and unsafe housing, and are closely monitored by North Korean agents to prevent escapes.

Most of their earnings are taken by the North Korean government, leaving workers with only a small amount upon return. Attempts to escape have become harder due to tighter controls. Experts say this flow of laborers will continue, reflecting the close ties between North Korea and Russia during the conflict, BBC reported.