(BBC News) Palmyra, one of the archaeological jewels of the Middle East, is reported to be under threat from advancing Islamic State (IS) militants in Syria.
The jihadists are within 2km (1.2 miles) of the Unesco World Heritage site, battling government forces for control of the adjacent town of Tadmur.
Syria's antiquities chief has warned that if IS seizes Palmyra it will destroy everything that exists there.
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