Refugees are seen at the refugee camp of Ritsona, about 86 kilometers north of Athens, Greece, on April 12, 2018. The European Union will continue supporting Greece, Italy and other countries which are at the forefront of the refugee challenge, EU Commissioner for Migration, Home Affairs and Citizenship Dimitris Avramopoulos said during a visit at the refugee camp of Ritsona on Thursday. (Xinhua/Marios Lolos)