Russia's "massive" military losses in Ukraine are unsustainable, NATO Secretary General warns, as conflict set to enter fourth year with no clear end in sight.

Ukraine-Russia war latest: ‘Brutal’ Kyiv attack cuts off power as Abu Dhabi peace talks end without breakthrough - Second day of landmark negotiations came as dozens injured and one killed in major Russian missile and drone attack,

The Trump White House is attempting to end Russia's invasion of Ukraine, but disagreements over territorial concessions continue.

"The Russians, at the moment, are losing massive amounts of their soldiers thanks to the Ukrainian defense," NATO Secretary General Mark Rutte told European lawmakers at a forum in Brussels on Tuesday. He said that 20,000 to 25,000 troops are dying each month as the war drags on.

The United States is accusing Russia of a “dangerous and inexplicable escalation” of the nearly four-year war in Ukraine at a time when the Trump administration is trying to advance negotiations toward peace.