Migrants react in front of a Greek police, as they wait to cross the border from Greece to Gevgelija, Macedonia November 22, 2015. Picture taken from the Macedonian side of the Macedonian-Greek border. (Photo by Ognen Teofilovski/Reuters)





Migrants react in front of a Greek police, as they wait to cross the border from Greece to Gevgelija, Macedonia November 22, 2015. (Photo by Ognen Teofilovski/Reuters)





Migrants react, as they wait to cross the border from Greece to Gevgelija, Macedonia November 22, 2015. (Photo by Ognen Teofilovski/Reuters)





A migrant holds a poster, as he waits to cross the border from Greece to Gevgelija, Macedonia November 22, 2015. (Photo by Ognen Teofilovski/Reuters)





Migrants rest, as they wait to cross the border from Greece to Gevgelija, Macedonia November 22, 2015. (Photo by Ognen Teofilovski/Reuters)





A migrant shouts slogans, as he waits to cross the border from Greece to Gevgelija, Macedonia November 22, 2015. (Photo by Ognen Teofilovski/Reuters)





Migrants stage a demonstration in front of Macedonian police, as they wait to cross the border from Greece to Gevgelija, Macedonia November 22, 2015. (Photo by Ognen Teofilovski/Reuters)





Migrants stage a demonstration in front of Macedonian police, as they wait to cross the border from Greece to Gevgelija, Macedonia November 22, 2015. (Photo by Ognen Teofilovski/Reuters)





A migrant shows his tattoo during a demonstration in front of Macedonian police, as he and others wait to cross the border from Greece to Gevgelija, Macedonia November 22, 2015. (Photo by Ognen Teofilovski/Reuters)





Migrants sleep as they wait to cross the Greek-Macedonian borders near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





Migrants wait to cross the Greek-Macedonian borders near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





Macedonian policemen stand guard as migrants wait to cross the Greek-Macedonian borders near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





Macedonian policemen stand guard as migrants wait to cross the Greek-Macedonian borders near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





A woman collapses during a demonstration as migrants wait to cross the Greek-Macedonian borders near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





A woman collapses during a demonstration as migrants wait to cross the Greek-Macedonian borders near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





Migrants carry a woman that collapsed during a demonstration as migrants wait to cross the Greek-Macedonian borders near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





Greek policemen push back Syrian, Iraqi and Afghan refugees who tried to force their way through the Greek-Macedonian borders near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





Greek policemen push back Syrian, Iraqi and Afghan refugees who try to force their way through the Greek-Macedonian borders near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





Migrants wait to cross the Greek-Macedonian borders near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





A man is covered with a blanket as migrants wait to cross the Greek-Macedonian borders near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





A child (bottom) falls on the ground as Greek policemen pushed back Syrian, Iraqi and Afghan refugees who tried to force their way through the Greek-Macedonian borders near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





Greek policemen carry away a woman as Syrian, Iraqi and Afghan refugees who try to force their way through the Greek-Macedonian borders are pushed back by Greek police, near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





A Greek policeman carries away a child during a scuffle with Syrian, Iraqi and Afghan refugees at the Greek-Macedonian borders near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





Greek medics carry a migrant who collapsed, on the border between Greece and Gevgelija, Macedonia November 22, 2015. (Photo by Ognen Teofilovski/Reuters)





Migrant sleeps as he waits to cross the border from Greece to Gevgelija, Macedonia, November 22, 2015. Conditions for hundreds of migrants stuck on Balkan borders worsened on Sunday as temperatures dropped and a first smattering of snow fell. Countries along the Balkan route taken by hundreds of thousands of migrants seeking refuge in western Europe last week began filtering the flow, granting passage only to those fleeing conflict in Syria, Iraq and Afghanistan. (Photo by Ognen Teofilovski/Reuters)





Migrants shout slogans and hold banners during a demonstration as they wait to cross the Greek-Macedonian border near the village of Idomeni, Greece November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





Migrants shout slogans during a demonstration as they wait to cross the Greek-Macedonian borders near the village of Idomeni, Greece, November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





A migrant man collapses during a demonstration as migrants wait to cross the Greek-Macedonian borders near the village of Idomeni, Greece, November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





Macedonian policemen push back Syrian, Iraqi and Afghan refugees who try to force their way through the Greek-Macedonian borders near the village of Idomeni, Greece, November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





Syrian, Iraqi and Afghan refugees try to cross the Greek-Macedonian borders near the village of Idomeni, Greece, November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





A migrant, who witnesses said to have deliberately injured himself during a demonstration, is carried away as migrants wait to cross the Greek-Macedonian borders near the village of Idomeni, Greece, November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





A migrant, who witnesses said to have deliberately injured himself during a demonstration, is carried away as migrants wait to cross the Greek-Macedonian borders near the village of Idomeni, Greece, November 22, 2015. (Photo by Alexandros Avramidis/Reuters)





A woman tries to protect her daughter as refugees scuffle with the Greek police in their effort to reach the borderline with Macedonia, near the Greek village of Idomeni, Sunday, November 22, 2015. Over 1,000 migrants gathered in the Greek town Idomeni protested Saturday against the decision by Macedonian authorities across the border to turn away migrants who are not from war zones such as Syria, Afghanistan and Iraq. (Photo by Giannis Papanikos/AP Photo)





A migrant cries as he watches other migrant gets his mouth sewed up during a protest next to the border from Greece to Gevgelija, Macedonia November 23, 2015. Conditions for hundreds of migrants stuck on Balkan borders worsened on Sunday as temperatures dropped and a first smattering of snow fell. Countries along the Balkan route taken by hundreds of thousands of migrants seeking refuge in western Europe last week began filtering the flow, granting passage only to those fleeing conflict in Syria, Iraq and Afghanistan. (Photo by Ognen Teofilovski/Reuters)





A migrant with his mouth sewed up participates in a protest as he waits with others to cross the border from Greece to Gevgelija, Macedonia November 23, 2015. (Photo by Ognen Teofilovski/Reuters)





A migrant with his mouth sewn shut in protest sits at the border with Greece near the village of Gevgelija, Macedonia November 23, 2015. (Photo by Ognen Teofilovski/Reuters)





Stranded Iranian migrant Hamid, 34, an electrical engineer from the Iranian town of Sanandij sits on rail tracks in front of Macedonian riot police guarding the border between Greece and Macedonia near the Greek village of Idomeni November 23, 2015. Hamid and a dozen other Iranian migrants are on hunger-strike for a second day. Balkan countries have begun filtering the flow of migrants to Europe, granting passage to those fleeing conflict in the Middle East and Afghanistan but turning back others from Africa and Asia, the United Nations and Reuters witnesses said. (Photo by Yannis Behrakis/Reuters)