6399; Men, suspected of being affiliated with the Islamic State (IS) group, gather in a prison cell in the northeastern Syrian city of Hasakeh on October 26, 2019. - Kurdish sources say around 12,000 IS fighters including Syrians, Iraqis as well as foreigners from 54 countries are being held in Kurdish-run prisons in northern Syria. LEHTIKUVA / AFP Fadel Senna