(BBC) The latent danger posed by thousands of defeated and captured fighters who joined the Islamic State (IS) group is festering and growing in the squalid, overcrowded prison camps of north-east Syria, where riots and attempted breakouts are becoming commonplace.
IS has vowed to liberate them, along with their wives and dependants, while a people-smuggling network is reportedly being put together using bribery to secure covert releases.
The ruling this month by Britain’s Court of Appeal that the British-born former schoolgirl Shamima Begum, stripped of her UK nationality, had a right to return to the UK to face justice has also thrown a spotlight on the issue. As has the recent death in Kurdish custody of a British IS fighter.