Flow of Ukrainian refugees testing limits of central Europe's capacity

Egor, 5, comforts his mother Helen Yakubets who cries in a ballroom, which has been converted to a temporary shelter, at the Mandachi hotel after fleeing from Chernihiv in Ukraine to Romania, following Russia's invasion of Ukraine, at the border crossing in Suceava, Romania, March 20, 2022. Her 18 year old son and husband remain in Ukraine to fight. REUTERS/Clodagh Kilcoyne

Officials in Central Europe voiced concern on Sunday that they were reaching capacity to comfortably house some of the nearly 3.5 million refugees who have fled Ukraine since Russia's invasion and are now camped in temporary accommodation.

Most of the Ukrainians have arrived at border points in Poland, Slovakia, Romania and Hungary, data compiled by the U.N. refugee agency shows, putting pressure on the European Union countries now attempting to shelter them.