Migrants cross a river, north of Idomeni, Greece, attempting to reach Macedonia on a route that would bypass the border fence, Monday, March 14, 2016. (Photo by Vadim Ghirda/AP Photo)





A man carries a baby as migrants cross a river, north of Idomeni, Greece, attempting to reach Macedonia on a route that would bypass the border fence, Monday, March 14, 2016. (Photo by Vadim Ghirda/AP Photo)





Migrants cross a river, north of Idomeni, Greece, attempting to reach Macedonia on a route that would bypass the border fence, Monday, March 14, 2016. (Photo by Vadim Ghirda/AP Photo)





A baby is passed from hand to hand as migrants cross a river, north of Idomeni, Greece, attempting to reach Macedonia on a route that would bypass the border fence, Monday, March 14, 2016. (Photo by Vadim Ghirda/AP Photo)





Migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Stoyan Nenov/Reuters)





Migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Stoyan Nenov/Reuters)





Migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Stoyan Nenov/Reuters)





Migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Stoyan Nenov/Reuters)





Migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Stoyan Nenov/Reuters)





Migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Stoyan Nenov/Reuters)





Migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Stoyan Nenov/Reuters)





A migrant is helped as he wades across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Stoyan Nenov/Reuters)





Migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Stoyan Nenov/Reuters)





Migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Stoyan Nenov/Reuters)





Migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Stoyan Nenov/Reuters)





Migrants are stopped by Greek riot police as they look for a way to cross the Greek-Macedonian border, near the village of Idomeni, Greece, March 14, 2016. (Photo by Alexandros Avramidis/Reuters)





Migrants pass through a Greek riot police cordon as they look for a way to cross the Greek-Macedonian border, near the village of Idomeni, Greece, March 14, 2016. (Photo by Alexandros Avramidis/Reuters)





A woman carries a baby as migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Alexandros Avramidis/Reuters)





Migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Alexandros Avramidis/Reuters)





Migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Alexandros Avramidis/Reuters)





Migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Alexandros Avramidis/Reuters)





A migrant tries to stop a child from falling in the water as migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Alexandros Avramidis/Reuters)





Migrants wade across a river near the Greek-Macedonian border, west of the the village of Idomeni, Greece, March 14, 2016. (Photo by Alexandros Avramidis/Reuters)





Migrants stand next to a river they waded as they look for a way to cross the Greek-Macedonian border, near the village of Idomeni, Greece, March 14, 2016. (Photo by Alexandros Avramidis/Reuters)





Migrants march on a road, north of Idomeni, Greece, during an attempt to reach Macedonia on a route that would bypass the border fence, Monday, March 14, 2016. Hundreds of migrants and refugees walked out of an overcrowded camp on the Greek-Macedonian border Monday, determined to use a dangerous crossing to head north. (Photo by Vadim Ghirda/AP Photo)





Migrants cross a river after leaving the Idomeni refugee camp on March 14, 2016 in Idomeni, Greece. The decision by Macedonia to close its border to migrants on Wednesday has left thousands of people stranded at the Greek transit camp. The closure, following the lead taken by neighbouring countries, has effectively sealed the so-called western Balkan route, the main migration route that has been used by hundreds of thousands of migrants to reach countries in western Europe such as Germany. Humanitarian workers have described the conditions at the camp as desperate, which has been made much worse by recent bouts of heavy rain. (Photo by Matt Cardy/Getty Images)





Migrants cross a river after leaving the Idomeni refugee camp on March 14, 2016 in Idomeni, Greece. (Photo by Matt Cardy/Getty Images)





A woman cries as she crosses the river along with other migrants, north of Idomeni, Greece, attempting to reach Macedonia on a route that would bypass the border fence, Monday, March 14, 2016. (Photo by Vadim Ghirda/AP Photo)





A woman is assisted while crossing the river along with other migrants, north of Idomeni, Greece, attempting to reach Macedonia on a route that would bypass the border fence, Monday, March 14, 2016. (Photo by Visar Kryeziu/AP Photo)





Migrants try to cross a river after leaving the Idomeni refugee camp on March 13, 2016 in Idomeni, Greece. (Photo by Matt Cardy/Getty Images)





A man reaches to take a child as migrants cross a river, north of Idomeni, Greece, attempting to reach Macedonia on a route that would bypass the border fence, Monday, March 14, 2016. (Photo by Vadim Ghirda/AP Photo)





Migrants and refugee cross a river on their way to Macedonia from a makeshift camp at the Greek-Macedonian border, near the Greek village of Idomeni on March 14, 2016, where thousands of them are stranded by the Balkan border blockade. Hundreds of migrants were stopped by Macedonian soldiers after illegally crossing the border from Greece on March 14, an AFP reporter saw. More than 14,000 people are stuck on the Greek side of the border in an overcrowded camp at Idomeni after the main migrant route to western Europe through the Balkans was effectively shut down last week. (Photo by Sakis Mitrolidis/AFP Photo)





A woman is supported by two men while crossing a river, north of Idomeni, Greece, as migrants attempt to reach Macedonia on a route that would bypass the border fence, Monday, March 14, 2016. (Photo by Vadim Ghirda/AP Photo)





Refugees make their way to Macedonia from a makeshift camp at the Greek-Macedonian border, near the Greek village of Idomeni on March 14, 2016, where thousands of refugees and migrants are stranded by the Balkan border blockade. Over 1000 refugees left the Idomeni camp on March 14, at noon to find a way to Macedonia. The German and Greek leaders blasted Balkan countries for shutting their borders to migrants ahead of an EU ministers meeting on March 10. Greek authorities said there were 41,973 asylum seekers in the country, including some 12,000 stuck at Idomeni on the closed Macedonian border. (Photo by Daniel Mihailescu/AFP Photo)





Refugee boy peeks out from a tent at the border between Greece and the Former Yugoslav Republic of Macedonia (FYROM), at a refugee camp, near the village of Idomeni, northern Greece, 13 March 2016. Greece has registered in its territory some 36,000 migrants trapped due to entry restrictions already imposed by Macedonia in recent months, by denying entry to all those who are considered economic migrants, prohibiting the passage of Afghans, and finally denying entry to all Syrians and Iraqis who are not from combat areas. (Photo by Nake Batev/EPA)





Migrants from a camp near Idomeni village, cross the river trying to find alternative way to cross the Greek-Macedonian border, near Idomeni, northern Greece, 14 March 2016. (Photo by Nake Batev/EPA)