President Volodymyr Zelenskyy says he will urge allies to boost Ukraine’s air defenses at a meeting this week in Germany, while both sides said Kyiv’s forces pressed new attacks Sunday in Russia’s Kursk region.

Ukraine has launched a new offensive in Russia’s Kursk region, according to the Kremlin. The attack looks to be an effort to seize new territory after Ukrainian troops swept across the border in a shock offensive in the same region in August,

The Kremlin on Saturday vowed "retaliation" for what it said was Ukraine's use of American-made Army Tactical Missile Systems against targets in a Russian border region.

Ukrainian forces started a surprising ground offense against Russia in August in the Kursk region but then began to lose ground after Russia deployed up to 12,000 North Korean troops in the region in its nearly three-year-long war in Ukraine.