Putin during the call on Tuesday praised the “bravery, heroism and self-sacrificing spirit” displayed by North Korean troops as they fought with Russian forces to repel a Ukrainian incursion into Russia’s Kursk border region,

Kim Jong Un provides Moscow with artillery, missiles - and as a BBC investigation shows, labourers working in 'slave-like' condition.

Russian President Vladimir Putin and North Korea's leader Kim Jong Un have vowed to strengthen cooperation, days ahead of Putin's summit in Alaska with Donald Trump, Pyongyang's state media reported Wednesday.