Police vehicles drive to the border between Greece and Macedonia in the southern Macedonian town of Gevgelija, Thursday, August 20, 2015. Macedonian police stepped up the security at the border with Greece apparently trying to stem recent surge of migrants who are coming from Greece. (Photo by Darko Vojinovic/AP Photo)

Police vehicles drive to the border between Greece and Macedonia, near the southern Macedonian town of Gevgelija, Thursday, August 20, 2015. (Photo by Darko Vojinovic/AP Photo)

A police helicopter flies over railroad tracks near the border between Greece and Macedonia, near the southern Macedonian town of Gevgelija, Thursday, August 20, 2015. (Photo by Darko Vojinovic/AP Photo)

Blocked migrants wait at no-man's land between Greece and Macedonia near the southern Macedonian town of Gevgelija, Thursday, August 20, 2015. (Photo by Darko Vojinovic/AP Photo)

A Macedonian police officer blocks migrants at no-man's land between Greece and Macedonia near the southern Macedonian town of Gevgelija, Thursday, August 20, 2015. (Photo by Darko Vojinovic/AP Photo)

Macedonian police block migrants at no-man's land between Greece and Macedonia near the southern Macedonian town of Gevgelija, Thursday, August 20, 2015. (Photo by Darko Vojinovic/AP Photo)

A Macedonian police officer blocks migrants at no-man's land between Greece and Macedonia near the southern Macedonian town of Gevgelija, Thursday, August 20, 2015. (Photo by Darko Vojinovic/AP Photo)

Workers are cleaning the railway station in the southern Macedonian town of Gevgelija, Thursday, August 20, 2015. (Photo by Darko Vojinovic/AP Photo)

A migrant girl looks as police officers secure the railway tracks before a train that would take the migrants towards Serbia enters the railway station, in the southern Macedonian town of Gevgelija, Wednesday, August 20, 2015. (Photo by Darko Vojinovic/AP Photo)

A police officer gives instructions to migrants rushing to board a train that would take them towards Serbia, at the railway station in the southern Macedonian town of Gevgelija, Wednesday, August 20, 2015. (Photo by Darko Vojinovic/AP Photo)

Two migrants try to rush on a train that is passing through Macedonia toward the Serbian border near the southern Macedonian town of Demir Kapija, Wednesday, August 19, 2015. (Photo by Darko Vojinovic/AP Photo)

Migrants travel on train taking them towards Serbia, near the southern Macedonian town of Demir Kapija, Wednesday, August 19, 2015. Record numbers of migrants from countries like Syria, Iraq and Afghanistan uses the so-called Balkan route that passes trough Macedonia. (Photo by Darko Vojinovic/AP Photo)

Migrants look out of a window onboard a crowded train taking them towards Serbia, at the railway station in the southern Macedonian town of Gevgelija, Wednesday, August 19, 2015. (Photo by Darko Vojinovic/AP Photo)

A migrant holds his daughter at Gevgelija railway station August 19, 2015. Thousands of migrants kept up the wait on Wednesday in a small Macedonian town in the hope of travelling onwards to Western Europe. After days of crowds overwhelming the small station at Gevgelija, Macedonian authorities have established special trains for migrants from south to the northern border with Serbia. (Photo by Ognen Teofilovski/Reuters)

Immigrants sleep at Gevgelija railway station, Macedonia August 19, 2015. (Photo by Ognen Teofilovski/Reuters)

Immigrants sleep at Gevgelija railway station, Macedonia August 19, 2015. (Photo by Ognen Teofilovski/Reuters)

Immigrants rest on a platform at Gevgelija railway station, Macedonia August 19, 2015. (Photo by Ognen Teofilovski/Reuters)

Immigrants sleep at Gevgelija railway station, Macedonia August 19, 2015. (Photo by Ognen Teofilovski/Reuters)

Immigrants sleep at Gevgelija railway station, Macedonia August 19, 2015. (Photo by Ognen Teofilovski/Reuters)

Immigrants sleep at Gevgelija railway station, Macedonia August 19, 2015. (Photo by Ognen Teofilovski/Reuters)

Immigrants sleep at Gevgelija railway station, Macedonia August 19, 2015. (Photo by Ognen Teofilovski/Reuters)

An immigrant from India rolls a cigarette at Gevgelija railway station, Macedonia August 19, 2015. (Photo by Ognen Teofilovski/Reuters)

Immigrants watch a train travelling to another country, as it passes through Gevgelija railway station, Macedonia August 19, 2015. (Photo by Ognen Teofilovski/Reuters)

A new group of more than a thousand immigrants wait at the border line of Macedonia and Greece to enter into Macedonia near Gevgelija railway station August 20, 2015. (Photo by Ognen Teofilovski/Reuters)

A new group of more than a thousand immigrants wait at the border line of Macedonia and Greece to enter into Macedonia near Gevgelija railway station August 20, 2015. (Photo by Ognen Teofilovski/Reuters)

People, part of a new group of more than a thousand immigrants, hold placards as they wait at the border line of Macedonia and Greece to enter into Macedonia near Gevgelija railway station August 20, 2015. (Photo by Ognen Teofilovski/Reuters)

A new group of more than a thousand immigrants wait at the border line of Macedonia and Greece to enter into Macedonia near Gevgelija railway station August 20, 2015. (Photo by Ognen Teofilovski/Reuters)

A new group of more than a thousand immigrants wait at the border line of Macedonia and Greece to enter into Macedonia near Gevgelija railway station August 20, 2015. (Photo by Ognen Teofilovski/Reuters)

A new group of more than a thousand immigrants wait at the border line of Macedonia and Greece to enter into Macedonia near Gevgelija railway station August 20, 2015. (Photo by Ognen Teofilovski/Reuters)

A new group of more than a thousand immigrants wait at the border line of Macedonia and Greece to enter into Macedonia near Gevgelija railway station August 20, 2015. (Photo by Ognen Teofilovski/Reuters)

A girl, part of a new group of more than a thousand immigrants, sleeps as they wait at the border line of Macedonia and Greece to enter into Macedonia near Gevgelija railway station August 20, 2015. (Photo by Ognen Teofilovski/Reuters)

Four-year-old Rashida from Kobani, Syria, part of a new group of more than a thousand immigrants, sleeps as they wait at border line of Macedonia and Greece to enter into Macedonia near Gevgelija railway station August 20, 2015. (Photo by Ognen Teofilovski/Reuters)

People, part of a new group of more than a thousand immigrants, gather near a Yugoslavia border stone, as they wait at the border line of Macedonia and Greece to enter into Macedonia near Gevgelija railway station August 20, 2015. (Photo by Ognen Teofilovski/Reuters)

A new group of more than a thousand immigrants wait at the border line of Macedonia and Greece to enter into Macedonia near Gevgelija railway station August 20, 2015. (Photo by Ognen Teofilovski/Reuters)

An immigrant, part of a new group of more than a thousand immigrants, sleeps as they wait at the border line of Macedonia and Greece to enter into Macedonia near Gevgelija railway station August 20, 2015. (Photo by Ognen Teofilovski/Reuters)

Macedonian special police guard the border as more than a thousand immigrants wait at the border line of Macedonia and Greece to enter Macedonia near the Gevgelija railway station August 20, 2015. (Photo by Ognen Teofilovski/Reuters)

A migrant woman eats as a Macedonian police vehicle is seen in the background near the village of Idomeni at the Greek-Macedonian border, August 20, 2015. Macedonia moved to cut off the flow of migrants pouring over its southern border with Greece on Thursday, deploying riot police in armored vehicles and calling out the army under a state of emergency. (Photo by Alexandros Avramidis/Reuters)

A migrant sleeps next to the train tracks near the village of Idomeni at the Greek-Macedonian border, August 20, 2015. (Photo by Alexandros Avramidis/Reuters)

A Macedonian police officer stands guard on the borderline with Greece as migrants rest on the Greek side of the borders, August 20, 2015. (Photo by Alexandros Avramidis/Reuters)

A migrant girl walks on the train tracks near the village of Idomeni at the Greek-Macedonian border, August 20, 2015. (Photo by Alexandros Avramidis/Reuters)

Migrants camp near the village of Idomeni at the Greek-Macedonian border, August 20, 2015. (Photo by Alexandros Avramidis/Reuters)

A Macedonian police officer talks with migrants standing on the Greek side at the Greek-Macedonian border, August 20, 2015. (Photo by Alexandros Avramidis/Reuters)

Migrants sleep near the village of Idomeni at the Greek-Macedonian border, August 20, 2015. (Photo by Alexandros Avramidis/Reuters)

Migrant sits on the Greek-Macedonian borderline, August 20, 2015. (Photo by Alexandros Avramidis/Reuters)

Policemen stand guard as passenger ship “Eleftherios Venizelos” carrying hundreds of Syrian refugees onboard arrives at the port of Piraeus near Athens, Greece, August 20, 2015. The ship was heading to the Greek mainland from islands in the Aegean Sea on Wednesday amid confusion over its final destination and the fate of passengers. On top of its economic crisis, cash-strapped Greece has been battling a huge influx in migrants arriving by boat from neighboring Turkey in recent weeks. About 21,000 people landed on Greek shores last week alone, prompting Athens to appeal to the European Union for help. (Photo by Stoyan Nenov/Reuters)

A Syrian refugee woman carries a child as they walk out of “Eleftherios Venizelos” passenger ship after its arrival at the port of Piraeus near Athens, Greece, August 20, 2015. (Photo by Stoyan Nenov/Reuters)

Syrian refugees listen to a Greek policeman after arriving at the port of Piraeus near Athens onboard “Eleftherios Venizelos” passenger ship, Greece, August 20, 2015. (Photo by Stoyan Nenov/Reuters)

A Syrian refugee man carries his luggage as he walks out of “Eleftherios Venizelos” passenger ship after its arrival at the port of Piraeus near Athens, Greece, August 20, 2015. (Photo by Stoyan Nenov/Reuters)

A Syrian refugee man runs with a child as they try to catch a bus following their arrival onboard “Eleftherios Venizelos” passenger ship at the port of Piraeus near Athens, Greece, August 20, 2015. (Photo by Stoyan Nenov/Reuters)

A Syrian refugee woman carries a child as they try to catch a bus following their arrival onboard “Eleftherios Venizelos” passenger ship at the port of Piraeus near Athens, Greece, August 20, 2015. (Photo by Stoyan Nenov/Reuters)

Syrian refugees look out from a bus window following their arrival onboard “Eleftherios Venizelos” passenger ship at the port of Piraeus near Athens, Greece, August 20, 2015. (Photo by Stoyan Nenov/Reuters)

A Syrian refugee man plays with children following their arrival onboard “Eleftherios Venizelos” passenger ship at the port of Piraeus near Athens, Greece, August 20, 2015. (Photo by Stoyan Nenov/Reuters)

Syrian refugees sit on the ground following their arrival onboard “Eleftherios Venizelos” passenger ship at the port of Piraeus near Athens, Greece, August 20, 2015. (Photo by Stoyan Nenov/Reuters)

Policemen watch the arrival of “Eleftherios Venizelos” passenger ship, carrying hundreds of Syrian refugees onboard at the port of Piraeus near Athens, Greece, August 20, 2015. (Photo by Stoyan Nenov/Reuters)

A Syrian refugee girl looks out from a bus window following her arrival onboard “Eleftherios Venizelos” passenger ship at the port of Piraeus near Athens, Greece, August 20, 2015. (Photo by Stoyan Nenov/Reuters)

A Syrian refugee family walks out of “Eleftherios Venizelos” passenger ship after its arrival at the port of Piraeus near Athens, Greece, August 20, 2015. (Photo by Stoyan Nenov/Reuters)

Syrian refugees are seen onboard passenger ship “Eleftherios Venizelos” as the ship arrives at the port of Piraeus near Athens, Greece, August 20, 2015. (Photo by Stoyan Nenov/Reuters)

Migrants walk to board a dinghy to sail off for the Greek island of Kos from the Turkish coastal town of Bodrum, Turkey, late August 19, 2015. Picture taken August 19, 2015. (Photo by Kenan Gurbuz/Reuters)

Migrants disembark from a dinghy after their failed attempt to sail off for the Greek island of Kos from the Turkish coastal town of Bodrum, Turkey, early August 20, 2015. (Photo by Kenan Gurbuz/Reuters)

A migrant is helped to disembark from Italian Coast Guard vessel Diciotti in the Sicilian harbour of Palermo, Italy, August 20, 2015. (Photo by Guglielmo Mangiapane/Reuters)

A migrant is helped to disembark from Italian Coast Guard vessel Diciotti in the Sicilian harbour of Palermo, Italy, August 20, 2015. (Photo by Guglielmo Mangiapane/Reuters)

A migrant is helped to disembark from Italian Coast Guard vessel Diciotti in the Sicilian harbour of Palermo, Italy, August 20, 2015. (Photo by Guglielmo Mangiapane/Reuters)

Migrants disembark from the Italian Coast Guard vessel “Diciotti” in the Sicilian harbour of Palermo, Italy, August 20, 2015. (Photo by Guglielmo Mangiapane/Reuters)

A migrant looks out from a bus window following their arrival onboard the Italian Coast Guard vessel Diciotti in the Sicilian harbour of Palermo, Italy, August 20, 2015. (Photo by Guglielmo Mangiapane/Reuters)

A Red Cross worker (L) gives instructions to migrants following their arrival onboard the Italian Coast Guard vessel “Diciotti” in the Sicilian harbour of Palermo, Italy, August 20, 2015. (Photo by Guglielmo Mangiapane/Reuters)

Migrants disembark from Italian Coast Guard vessel “Diciotti” in the Sicilian harbour of Palermo, Italy, August 20, 2015. (Photo by Guglielmo Mangiapane/Reuters)

Somalian migrant Fadhumo Musa Afrah sits in her flat in the “Sharehaus Refugio” community in Berlin, where Germans and migrants live together, Germany August 19, 2015. (Photo by Axel Schmidt/Reuters)

Somalian migrant Fadhumo Musa Afrah uses a laptop in her flat in the “Sharehaus Refugio” community in Berlin, where Germans and migrants live together, Germany August 19, 2015. (Photo by Axel Schmidt/Reuters)

Somalian migrant Fadhumo Musa Afrah greets a guest in the “Sharehaus Refugio” community in Berlin, where Germans and migrants live together, Germany August 19, 2015. (Photo by Axel Schmidt/Reuters)

Syrian migrant Eyad Ibrahim Aghe prepares a meal together with Denise Lillge, the accountant of the “Sharehaus Refugio” community in Berlin, where Germans and migrants live together, Germany August 19, 2015. (Photo by Axel Schmidt/Reuters)

Somalian migrant Fadhumo Musa Afrah unpacks a chair in her flat in the “Sharehaus Refugio” community in Berlin, where Germans and migrants live together, Germany August 19, 2015. (Photo by Axel Schmidt/Reuters)

Syrian migrant Eyad Ibrahim Aghe uses a mobile phone in the corridor of the “Sharehaus Refugio” community in Berlin, where Germans and migrants live together, Germany August 19, 2015. (Photo by Axel Schmidt/Reuters)

Patriz, a migrant child from the Balkans, walks across the corridor of the “Sharehaus Refugio” community in Berlin, where Germans and migrants live together, Germany August 19, 2015. (Photo by Axel Schmidt/Reuters)

Afghan migrant Ajamal sits in a window of a flat in the “Sharehaus Refugio” community in Berlin, where Germans and migrants live together, Germany August 19, 2015. (Photo by Axel Schmidt/Reuters)

Migrants and Germans of the “Sharehaus Refugio” community have dinner on their roof garden in Berlin, Germany August 19, 2015. (Photo by Axel Schmidt/Reuters)

Migrants and Germans of the “Sharehaus Refugio” community have dinner on their roof garden in Berlin, Germany August 19, 2015. (Photo by Axel Schmidt/Reuters)

Migrants and Germans of the “Sharehaus Refugio” community have dinner on their roof garden in Berlin, Germany August 19, 2015. (Photo by Axel Schmidt/Reuters)