HNewsWire- United Nations estimates that 150,000 Ukrainian refugees have fled into neighboring countries, half of whom have gone to Poland and many more to Hungary, Moldova and Romania as a result of the Russian invasion; if conditions worsen, the number of refugees could easily reach a million, according to UN estimates.

According to UN refugee director Filippo Grandi, "more than 150,000 Ukrainian refugees have now crossed into neighboring countries, half of whom have gone to Poland and many more to Hungary, Moldova, Romania, and other countries," he said in a tweet on Saturday.

In an interview with Associated Press News, Shabia Mantoo, spokesperson for the UN High Commissioner for Refugees, said the number of Ukrainian refugees is "changing by the hour" and that the situation is "extremely fluid."

In an effort to "demilitarize" Ukraine, Russian military launched a full-scale invasion of the nation on Thursday morning. As a result of a bombardment of missiles, artillery, and airstrikes launched throughout the nation, one of the largest security crises in Europe in more than half a century has erupted, with a flood of migrants pouring into Poland, Slovakia, Hungary, and Romania currently ongoing.

If the invasion continues to deepen, according to United Nations estimates, as many as four million people might escape the nation into neighboring countries.

As we reported on Thursday, only hours after Russia's invasion began, a large number of people were fleeing the Ukrainian city of Kyiv, causing a significant traffic jam on the country's roads. People are still attempting to evacuate the capital, despite the fact that Russian soldiers are closing in.

Irina Saghoyan, the eastern Europe director for Save the Children International, which has been on the ground in Ukraine since 2014, explained that "there is a significant movement of the population," but that "it is also difficult to say whether people are moving permanently or for a short period of time."

For the time being, central Europe is greeting Ukrainian migrants with open arms, with Poland preparing to take in up to a million additional arrivals in the coming months.