North Korean troops are said to have clashed with Ukrainian forces in the Russian region of Kursk for the first time on Tuesday, the same day American voters re-elected Donald Trump for president, an isolationist who has argued against sending further military aid to Ukraine. "The first battles with North Korean soldiers open a new page of instability in the world," said Ukrainian President Volodymyr Zelenskyy in his evening address. "We must do everything to make this Russian step to expand the war – to really escalate it – to make this step a failure." Ukrainian Defence Minister Rustem Umerov said the clashes were "small scale" and that the North Korean troops were not fighting as separate formations but were embedded in Russian units disguised as Buryats from the Russian Federation. On Saturday, Ukraine's military intelligence (GUR) had said Russia transferred more than 7,000 North Korean military personnel "to areas near Ukraine" in the last week of October – a much higher figure than the 3,000 North Korean soldiers South Korean and United States intelligence had said were in Russia's Kursk region on October 30.

Ukraine's President Volodymyr Zelenskyy has urged its allies to stop "watching" and take steps before North Korean troops deployed in Russia reach the battlefield, and the country's army chief warned that his troops are facing "one of the most powerful offensives" by Moscow since the all-out war started more than two years ago. Zelenskyy raised the prospect of a preemptive Ukrainian strike on camps where the North Korean troops are being trained and said Kyiv knows their location. But he said Ukraine cannot do it without permission from allies to use Western-made long-range weapons to hit targets deep inside Russia. "But instead … America is watching, Britain is watching, Germany is watching. Everyone is just waiting for the North Korean military to start attacking Ukrainians as well," Zelenskyy said in a post late Friday on the Telegram messaging app. The Biden administration said on Thursday that some 8,000 North Korean soldiers are now in Russia's Kursk region near Ukraine's border and are preparing to help the Kremlin fight against Ukrainian troops in the coming days.

Ukraine prepared to fight North Korean troops in the Russian region of Kursk on Wednesday, as the entry of a second nuclear power in Russia's war against Ukraine threatened to escalate and broaden the conflict. The United States Pentagon confirmed on Tuesday that North Korean troops were in Kursk, where Ukraine launched a counter-invasion almost three months ago. Pentagon spokesman Pat Ryder said there was "a small number [of North Korean troops] in the Kursk oblast, with a couple of thousand more that are almost there or due to arrive imminently". A senior South Korean official told reporters on Wednesday that about 3,000 North Korean troops were being moved close to the front lines. NATO Secretary-General Mark Rutte confirmed the deployment on Monday.

Fox News Flash top headlines are here. Check out what's clicking on Foxnews.com. Ukrainian President Volodymyr Zelenskyy said Tuesday that the thousands of North Korean soldiers expected to reinforce Russian troops on the front line in Ukraine are pushing the almost three-year war beyond the borders of the warring parties. Western leaders say North Korea has sent some 10,000 soldiers to help Russia's military campaign and warn that its involvement in a European war could also unsettle relations in the Indo-Pacific region, including Japan and Australia. Zelenskyy said he spoke to South Korean President Yoon Suk Yeol and told him that 3,000 North Korean soldiers are already at military bases close to the Ukrainian front line and that he expects that deployment to increase to 12,000.

United States defence secretary Lloyd Austin has waded in on reports that North Korea was preparing to enter the Ukraine war with troops. "If they are co-belligerents, if their intention is to participate in this war on Russia's behalf, that is a very, very serious issue," Austin said. Austin was returning from his fourth visit to Kyiv, where he announced a 400m package of US weapons for Ukraine. John Kirby, White House national security spokesman, said Washington believes that at least 3,000 North Korean soldiers arrived this month by sea to Vladivostok, Russia's largest Pacific port. "These soldiers then travelled onward to multiple Russian military training sites in eastern Russia, where they are currently undergoing training," Kirby said on Wednesday.

Ukraine launched a series of drones targeting Moscow and western Russia, according to regional officials. Russian air defence units downed 110 Ukrainian drones over Russia, the Ministry of Defence said, including one over the Moscow region, 43 over the border region of Kursk, and 27 over the southwestern Lipetsk region. Russia's air defence units destroyed at least one drone flying towards the capital, Moscow Mayor Sergei Sobyanin said on the Telegram messaging app, while drone debris sparked several short-lived fires in Lipetsk, the regional governor said on the app. No injuries or significant damage were reported from the attacks. Four firefighters suffered minor shrapnel wounds in a Ukrainian drone attack in an industrial zone in the city of Dzerzhinsk in Russia's Nizhny Novgorod region, the regional governor said.