VATICAN CITY (Reuters) - Pope Francis is urging nations to "open their hearts and doors" to migrants.

Thousands have been stranded at this camp on the Greece-Macedonia border for weeks.

''How is it possible that so much suffering can befall innocent men, women and children and even when they try to enter somewhere else, the doors are shut to them?" said the Pope. "They are there, at the border, because so many doors and so many hearts are closed. Immigrants today suffer in the open air, without food and cannot get in, they don't feel welcome. I like it very much when I see that nations and leaders open their hearts and open their doors.''

More than 1.1 million migrants flowed into the European Union in 2015, and the influx continues.