The number of displaced Ukrainians has increased by nearly a half-million in three days, bringing the total number of refugees to nearly 1.5 million, a United Nations agency estimates.

More than 1.45 million people have left Ukraine since the Russian invasion began last week, the International Organization for Migration confirmed to the Washington Examiner on Saturday. One-third of these displacements occurred in the past three days amid the United Nations High Commissioner for Refugees’s Thursday announcement that the number of Ukrainians crossing to neighboring countries had reached 1 million.