As dusk settles over the isolated Saharan town Kufra, young guards order a few hundred migrants lined up at a detention centre to chant 'Libya free, Chadians out', before they kneel down for evening prayers. Most of the prisoners in the small, squalid compound called the Freedom Detention Centre – run by Kufra’s military council – are from Chad. Hundreds more, from Somalia, Eritrea and Ethiopia, were moved to bigger facilities due to overcrowding.