The United Nations Refugee Agency's (UNHCR) Special Envoy Angelina Jolie called on world leaders gathering in New York later this month to put the "root causes of the Syrian conflict and what it will take to end it" at the centre of their discussions.

During a visit to the Azraq refugee camp in Jordan on Friday, Jolie said all of the camp's 60,000 residents had suffered loss and trauma, yet still count themselves "among the lucky ones."

She added that the 75,000 Syrians stranded in the no-man's land on the Jordanian border known as the Berm had no access to humanitarian assistance and no basic protections.

The world has known about the situation in the Berm for months, she said, but no solutions have been put forward.

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