The U.S. says there will be a "firm response" as Ukrainian forces holding ground in Russia's Kursk region now face North Korean troops "engaging in combat."

South Korean and US intelligence services have confirmed the participation of North Korean soldiers in hostilities in Russia, particularly in Kursk Oblast. Source: ISW Details: South Korea's National Intelligence Service reported on 13 November that North Korean troops were participating in hostilities in Russia,

According to the assessment of a nation in the Group of Seven, China is unlikely to be pleased with the alliance between Russia and North Korea, the people said. The upcoming G-20 summit in Rio will be an opportunity to push the issue with Beijing, said the people, without providing more specifics.