Nearly 40,000 Syrian civilians who have fled the conflict in Aleppo are stranded at the Turkish border. Turkey has already given refuge to millions who have fled Syria throughout the conflict, having sheltered more than 2.5 million, the world's largest refugee population. However, in recent months Turkey has come under growing pressure to impose stricter border controls in order to stem the onward flow of refugees.

Despite Turkish authorities saying the border was open to those fleeing the war-torn country, the Oncupinar crossing near the Turkish city of Kilis has been largely shut for nearly a year. As a result, refugees have been led into camps lying along the border between the two countries, leaving them with little choice but to reside in Bab al Salam, on the Syrian side of the Oncupinar gate.

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Children in a camp near the Turkish border, as thousands of Syrians flee the embattled northern city of Aleppo Bulent Kilic/ AFP
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A Syrian child cries as refugees wait in a camp in Bab-Al Salam, near the Turkish crossing gate in northern SyriaBulent Kilic/ AFP
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Refugees wait inside a car near the Turkish border crossing gateBulent Kilic/ AFP
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A boy looks on as Syrians fleeBulent Kilic/ AFP
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A man stands near a fence in Bab-Al SalamBulent Kilic/ AFP
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A refugee warms himself at a bonfire Bulent Kilic/ AFP
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A boy arrives with womenBulent Kilic/ AFP

The Turkish Humanitarian Relief Foundation (IHH) has set up tents for the tens of thousands who have fled an escalating government assault on Aleppo, as air strikes continue to target villages on the road linking the city to the Turkish border.

"I've been in Turkey for three years now," said Syrian refugee, Mohammed Allawi Shewevi. "My sister's husband and her son were killed in Syria. My sister is still in Syria. Russian planes bombed our houses. I am waiting for them. I hope Turkey will let my sister cross the border."

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A Syrian woman carries her belongings as she arrives at a refugee camp near the Bab al-Salam crossing, SyriaOsman Orsal/ Reuters
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A woman carries a baby on her back in Bab-Al SalamBulent Kilic/ AFP
Syrian refugees
A  woman carries her belongingsBulent Kilic/ AFP
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A young boy carries a mattressBulent Kilic/ AFP
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A refugee carrying blankets after arriving at the Turkish border crossing gate in Bab al-SalamBulent Kilic/ AFP
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A man carries his belongings Bulent Kilic/ AFP
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A woman carries a bagBulent Kilic/ AFP
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A child carries a water containerBulent Kilic/ AFP
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A girl carries water containersOsman Orsal/ Reuters
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Refugees arrive at the Turkish border crossing gate in Bab al-Salam, northern SyriaBulent Kilic/ AFP
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Children sit on a car in Bab al-Salam, near the Turkish border crossingBulent Kilic/ AFP
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Refugees push each other as they wait for tents in Bab al-Salam, northern SyriaBulent Kilic/ AFP
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Refugees wait for tentsBulent Kilic/ AFP
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Men stand on the roof of a vehicleBulent Kilic/ AFP
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Syrians stand outside a campBulent Kilic/ AFP

Rebel-held areas in and around Aleppo, Syria's largest city before the war, are still home to 350,000 people, and aid workers have said they could soon fall to the government.

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A child tries to climb over a fence in Bab al-SalamBulent Kilic/ AFP
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A boy looks over a fence in Bab al-SalamBulent Kilic/ AFP
Syrian refugees
A  Syrian boy looks out from his tentOsman Orsal/ Reuters
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Refugees walk between tentsBulent Kilic/ AFP
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A man eats food at a refugee camp in Bab al-SalamBulent Kilic/ AFP
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People sit and wait on the pavement at Turkey's Oncupinar border crossingOsman Orsal/ Reuters
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Refugees wait near the Turkish borderBulent Kilic/ AFP
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An injured 15-year-old boy enters Turkey for treatment with his fatherOsman Orsal/ Reuters
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People sit on the pavement as they waitOsman Orsal/ Reuters
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A  woman carries a babyOsman Orsal/ Reuters
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Syrian children playOsman Orsal/ Reuters
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A Syrian boy in a shelterOsman Orsal/ Reuters
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A Syrian girl in a shelterOsman Orsal/ Reuters
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Children, covered with mud, wait with their families in the town of Khirbet Al-Joz, in Latakia countryside, as they seek permission to cross into TurkeyAmmar Abdullah/ Reuters
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A woman carries her belongings as she is stuck with others in the town of Khirbet Al-JozAmmar Abdullah/ Reuters
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Refugees in Khirbet Al-JozAmmar Abdullah/ Reuters
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A refugee girl criesBulent Kilic/ AFP
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Refugee children wait near the Turkish borderBulent Kilic/ AFP
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A man stands near the Turkish borderBulent Kilic/ AFP
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A child by the Turkish border crossing Bulent Kilic/ AFP
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A woman cries as Syrians flee AleppoBulent Kilic/ AFP