More than one million migrants and refugees have entered Europe this year, according to an intergovernmental organisation.
The International Organization for Migration (IOM) says the million mark was crossed on Monday - a more than a four-fold increase in comparison with last year.
The actual number of arrivals recorded as having entered the continent by 21 December was 1,005,504.
The Geneva-based group says more than 800,000 crossed into Greece from Turkey during 2015, including more than 455,000 from Syria and over 186,000 from Afghanistan.
Nearly 3,700 others died trying to cross the Mediterranean amid Europe's worst refugee crisis since World War II, it added.