New border controls in the western Balkans are leaving migrants stranded behind barbed wire as temperatures start to plunge, and aid agencies warned on Friday that the clampdown would lead to a rise in migrant smuggling.
Balkan countries have begun filtering the flow of migrants, granting passage to those fleeing conflict in the Middle East and Afghanistan, but turning back thousands from Africa and Asia.
. A girl wearing a thermal blanket passes by an abandoned boat used by refugees after her arrival on Lesbos on Nov. 20.
. A migrant family disembarks from the Ariadne passenger ferry after having their documents checked, at the port of Piraeus, near Athens, Greece, on Nov. 20.
. A man kisses his wife as she holds their children just after their arrival on Lesbos on Nov. 19.
On Macedonia's southern border with Greece, crowds of people were backed up, denied entry.
. Migrants hold their documents as they are blocked by Macedonian policemen near Idomeni on Nov. 20.
In the wake of the recent terror attacks in Paris, new concerns have arisen regarding whether or not the huge influx of refugees allows opportunities for ISIS terrorists to enter western nations.
Lawmakers in the U.S. House voted Thursday to essentially halt a program aimed at resettling thousands of Syrian refugees fleeing their war-torn homeland.
. A Macedonian soldier tries to control refugees at the border on Nov. 20.
. A man carries firewood after crossing the border near Gevgelija on Nov. 20.
. Migrants and refugees keep warm around a bonfire as they wait to enter a registration camp after crossing the border near Gevgelija on Nov. 20.
. Refugees and migrants walk to a registration and transit camp after crossing border near Gevegelija on Nov. 20.
. Migrants wait to cross the border near Gevgelia, on Nov. 20.
. Clothing left by migrants hang on a tree near Serbia-Macedonian border on Nov. 19.