Since the start of the war on Feb. 24 until May 11, 727,205 people have registered in Germany's Central Register of Foreigners (AZR), of which 93% hold Ukrainian citizenship, Welt reported. A significant number may have travelled on to other European Union countries or returned to Ukraine, it said.

Around 40% of Ukrainian refugees were minors and women make 81% of the adult refugees registered, Welt added.

The Russian invasion has triggered a massive displacement of people, including more than 8 million Ukrainians within the country, according to the latest International Organization for Migration (IOM) report.

The number of people who have fled Ukraine has passed 6 million, in Europe's worst refugee crisis since the end of World War Two, a U.N. refugee agency said on Thursday.

(Reporting by Riham Alkousaa; Editing by Angus MacSwan)