First reported deaths of North Korean soldiers fighting against Ukraine

North Korea has sent up to 12,000 troops to help support Russia's invasion of its neighbour

North Korean troops have been killed during combat against Ukrainian forces in Russia's Kursk border region, according Ukraine's military intelligence agency and the Pentagon.

The deaths are the first reported since the US and Ukraine announced that North Korea had sent 10,000 to 12,000 troops to Russia to help it in the almost three-year war.