“This is not a drill. It is a red alert,” said the UN rights chief, Volker Türk, on Friday. He was warning that catastrophe was unfolding in the strategically important Sudanese city of El Obeid in north Kordofan. Near-siege conditions are tightening, relentless drone attacks continue and the paramilitary Rapid Support Forces (RSF) and allies are massing around it.

Two decades ago, after the genocide in Darfur, the world said “never again”. But it is happening again, and few are even paying attention. The alarm was raised repeatedly last year as the starvation siege of El Fasher in north Darfur deepened. Tens of thousands of people were killed in the subsequent massacre, with one witness describing “a scene out of a horror movie”. UN investigators reported “the hallmarks of genocide”, including explicit calls to eliminate non-Arab communities. Civilians who fled were raped and murdered; so were those who stayed. Before El Fasher came a........

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