Russian President Vladimir Putin has hailed North Korean troops sent to fight in Ukraine as heroic in a letter to Kim Jong Un, North Korean state.

In a letter marking the anniversary of Korea's liberation from Japanese rule, President Putin recalled how Soviet Red Army units and North Korean forces fought together to end Japan's colonial occupation.

President Putin said in a letter revealed by North Korean state media that the bonds of militant friendship, goodwill and mutual aid which were consolidated in the days of the war long ago remain solid and reliable.

The Russian president revealed that the friendship was fully proved by the heroic participation of the DPRK soldiers in liberating the territory of Kursk Region from the Ukrainian occupants.

President Putin added that the two countries would continue to act jointly and effectively defend their sovereignty and make a significant contribution to establishing a just and multi-polarised world order.

Russia and North Korea have been forging increasingly closer ties, with the two countries signing a mutual defence pact last year, when Putin visited the reclusive state.

In April, North Korea confirmed for the first time that it had deployed a contingent of its soldiers to the front line in Ukraine, alongside Russian troops.

South Korean and Western intelligence agencies have said Pyongyang sent more than 10,000 soldiers to Russia's Kursk region in 2024, along with artillery shells, missiles and long-range rocket systems.

Seoul said around 600 North Korean soldiers have been killed and thousands more wounded fighting for Russia. #