The United States on Monday implored all countries supplying weapons to Sudan’s warring parties to halt arms sales, warning that history in the vast western Darfur region where there was a genocide 20 years ago “is repeating itself”.

US Ambassador Linda Thomas-Greenfield told reporters after an emergency closed meeting of the U.N. Security Council that El Fasher, the only capital in Darfur not held by paramilitary forces, is “on the precipice of a large-scale massacre.”