The number of Ukrainian refugees fleeing Russia's war in their country has crossed 4.1 million, the United Nations said Friday, adding: "This tragedy must stop".
The flow of people escaping across the western borders to flee the Russian assault has settled at around 40,000 a day over the past week.
UNHCR, the UN refugee agency, said 4,102,876 Ukrainians had fled the country since the February 24 invasion -- a figure up 43,771 on Thursday's numbers.