Refugees from Ukraine board buses and trains at the Polish border city of Przemysl. The number of refugees fleeing Ukraine since Russia's invasion grew by more than 100,000 over the past 24 hours, the United Nations says. UNHCR, the UN refugee agency, says 3,169,897 Ukrainians have now fled across the border since the war began on February 24, a figure up 106,802 from the previous day. IMAGES