A refugee Refik, from the northern Syrian town of Afrin, plays a string instrument near the border fence at the makeshift camp along the Greek-Macedonian border, near the Greek village of Idomeni on April 1, 2016, where thousands of refugees and migrants are stranded by the Balkan border blockade. UN chief Ban Ki-moon on March 30 called for a united global effort to tackle the Syrian refugee crisis, as he opened a conference on securing resettlement places for nearly half a million of those displaced. More than one million migrants – about half of them Syrians – reached Europe via the Mediterranean last year, a rate of arrivals that has continued through the first three months of 2016. (Photo by Bulent Kilic/AFP Photo)





A woman walks with children at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





A man walks along railway tracks at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





Children play by the fire at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





A girl stands between tents at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





A girl stands amid smoke at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





A woman adjusts her scarf at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





A man sits on the bench at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





A family sits by the fire at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





A migrant from Pakistan stands on a field after taking a bath before Friday prayer at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





Migrants from Pakistan take a bath before Friday prayer at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





Children play at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





A child plays at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





A man with a child looks at the border fence at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





Migrants and refugees queue for food at a makeshift camp at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





Children look out from a tent at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





A woman and a child make a bonfire at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





A woman with a child sits in front of their tent at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. (Photo by Marko Djurica/Reuters)





A migrant holds a banner as he blocks the road during a protest near the Greek-Macedonian border, near the town of Polykastro, Greece, April 2, 2016. (Photo by Marko Djurica/Reuters)





Migrants and refugees block the highway during a protest near the Greek-Macedonian border, near the town of Polykastro, Greece, April 2, 2016. (Photo by Marko Djurica/Reuters)





Migrants and refugees block the highway during a protest near the Greek-Macedonian border, near the town of Polykastro, Greece, April 2, 2016. (Photo by Marko Djurica/Reuters)





Migrants and refugees block the highway during a protest near the Greek-Macedonian border, near the town of Polykastro, Greece, April 2, 2016. (Photo by Marko Djurica/Reuters)





A child sleeps as migrants and refugees block the highway during a protest near the Greek-Macedonian border, near the town of Polykastro, Greece, April 2, 2016. (Photo by Marko Djurica/Reuters)





A woman with a child looks out from a container at a makeshift camp for migrants and refugees at the Greek-Macedonian border, near the village of Idomeni, Greece, April 2, 2016. (Photo by Marko Djurica/Reuters)





Internally displaced boys play table football inside a refugee camp in Dana town after fleeing Palmyra, in northern Idlib province, Syria April 2, 2016. (Photo by Khalil Ashawi/Reuters)





An internally displaced man sleeps in the shade of a tent inside a refugee camp in Dana town after fleeing Palmyra, in northern Idlib province, Syria April 2, 2016. (Photo by Khalil Ashawi/Reuters)





Internally displaced children run inside a refugee camp in Dana town after fleeing Palmyra, in northern Idlib province, Syria April 2, 2016. (Photo by Khalil Ashawi/Reuters)





A child stands by his father, who is preparing a meal, at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016. (Photo by Marko Djurica/Reuters)





A child inflates a balloon at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016. (Photo by Marko Djurica/Reuters)





A child shows his chest painted in the colours of the German flag at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016. (Photo by Marko Djurica/Reuters)





Children sit on a bench at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016. (Photo by Marko Djurica/Reuters)





A child looks on at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016. (Photo by Marko Djurica/Reuters)





A man plays with a child at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016. (Photo by Marko Djurica/Reuters)





A woman bathes a child at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016. (Photo by Marko Djurica/Reuters)





A child feeds another child at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016. (Photo by Marko Djurica/Reuters)





A child wearing a mask plays at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016. (Photo by Marko Djurica/Reuters)





Two Afghan migrants sit at the dock next to a makeshift camp for refugees and migrants at the port of Piraeus, near Athens, Greece April 3, 2016. (Photo by Alkis Konstantinidis/Reuters)





Children play with a wheelchair at a makeshift camp for refugees and migrants at the port of Piraeus, near Athens, Greece April 3, 2016. (Photo by Alkis Konstantinidis/Reuters)





A child sleeps outside a tent at a makeshift camp for refugees and migrants at the port of Piraeus, near Athens, Greece April 3, 2016. (Photo by Alkis Konstantinidis/Reuters)





Nadia Murad Basee Taha (C), an Iraqi woman of the Yazidi faith who was abducted and held by the Islamic State for three months, walks through a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants and refugees gather to listen to Nadia Murad Basee Taha (not pictured), an Iraqi woman of the Yazidi faith who was abducted and held by the Islamic State for three months, at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants and refugees gather to listen to Nadia Murad Basee Taha (not pictured), an Iraqi woman of the Yazidi faith who was abducted and held by the Islamic State for three months, at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants and refugees sit on a railway track at a makeshift camp at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016. (Photo by Marko Djurica/Reuters)