An SDF official, Siamand Ali, said the presence of foreigners at al-Hol and the smaller Roj camp is a burden on the force that also protects the facilities and raids IS sleeper cells that carry out deadly attacks in Syria.
Iraq brings home roughly 700 more citizens linked to the Islamic State group from a Syrian camp
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IS in particular aims to storm SDF-run prisons to free militants, he said.
IS attacks on Syria truffle hunters are deadliest in a year
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