"In months, this is (20,000) to 25,000 Russians dead. I'm not talking seriously wounded, killed. Dead. Twenty to 25,000 a month," Rutte told attendees. "When you compare that to the Afghan war in the 1980s, they lost 20,000 in 10 years. Now, they lose these amounts, and more, in one month. So, that's also unsustainable on their side."
Moscow has continued striking Kyiv with missiles and drones as Washington works to secure a potential peace agreement to end the conflict.
Repeated Russian strikes on Ukraine in recent weeks have left hundreds of thousands without electricity and heating as temperatures plunge below freezing.
Ukrainian President Volodymyr Zelenskyy said Wednesday that Russia struck the Dnipro, Zhytomyr, Zaporizhzhia, Kharkiv and Kherson regions, targeting its energy sites and critical infrastructure.
U.S. Deputy Ambassador to the United Nations Tammy Bruce condemned previous Russian strikes during an emergency Security Council meeting in New York Monday as a "dangerous and inexplicable escalation."