U.N.: 4 million refugees have fled Ukraine since the start of Russia’s invasion April 1, 2022 by admin U.N.: 4 million refugees have fled Ukraine since the start of Russia’s invasion The United Nations says more than 4 million refugees have fled Ukraine since Russia launched its war. Debora Patta has the latest news. View CBS News In CBS News App Open Chrome Safari Continue Be the first to know Get browser notifications for breaking news, live events, and exclusive reporting.