<span style="color: #222222;">The International Organization for Migration says more than 3 million people have fled Ukraine since Russia invaded last month.</span><br />'' <span style="color: #222222;"><br />'' The new milestone also indicated that some 157,000 third-country nationals – people who aren't Ukrainian – were part of the outflow in what U.N. officials have called the largest refugee crisis in Europe since World War II.<br />'' IOM spokesman Paul Dillon said at a U.N. news briefing in Geneva on Tuesday that the totals were compiled from figures provided by national authorities.</span><br />'' <span style="color: #222222;"><br />'' The U.N. refugee agency UNHCR, which provides a more detailed count than the IOM though based on similar data, has reported that more than 1.8 million of the refugees were in Poland.<br />''<br />''UNHCR spokesman Matthew Saltmarsh said some 300,000 had moved on from there to Western Europe and noted that the vast majority of those fleeing have been women and children.</span><br />