NATO aircraft scrambled from Romania following a large-scale Russian attack on across Ukraine overnight, including in the Odesa region near Danube River border with allied nation.

Lithuania shared images of a new series of border defenses underway that are designed to stop a Russian advance into NATO.

Ukraine's President Volodymr Zelensky has accused Russia of "doing everything it can" to prevent a meeting with Vladimir Putin to try to end the war. US President Donald Trump has sought to bring the two leaders together, but he said on Friday "that's like oil and vinegar... they don't get along too well".

Russia said Wednesday attempts to resolve security issues relating to Ukraine without Moscow's participation were a "road to nowhere," and that much diplomatic work needs to be done before Vladimir Putin and Volodymyr Zelenskyy are ever in the same room.

As the front lines froze, and air defenses got better, Russia and Ukraine pivoted away from close bombing runs to standoff attacks.

US President Donald Trump said on Sunday that Ukrainian President Volodymyr Zelensky "can end the war with Russia almost immediately" while dismissing the idea of Ukraine joining NATO and returning the Russian-annexed Crimean Peninsula as unrealistic.

Russia’s ongoing attacks on nuclear power plants in Ukraine might presage similar battle tactics in a future war with NATO, says a British expert on Moscow’s military.

Vladimir Putin is demanding that Ukraine give up all of the eastern Donbas region, renounce ambitions to join NATO, remain neutral and keep Western troops out of the country, three sources familiar with top-level Kremlin thinking told Reuters.

Ukrainian drones have struck the Unecha oil pumping station in Russia's Bryansk region, according to reports. Meanwhile, Kim Jong Un has awarded North Korean troops who fought for Russia in the war against Ukraine.