Since the start of the war in Sudan on April 15, the capital Khartoum has been the scene of a deadly power struggle between warring generals Abdel Fattah al-Burhan and Mohamed Hamdan "Hemedti" Dagalo. But in the west of the country, in Darfur, a different horror is unfolding. Hemedti's Rapid Support Forces (RSF) paramilitary and local Arab militia groups are systematically targeting the African Masalit ethnic group. Numerous videos have emerged of torture, massacres and arbitrary arrests. Refugees speak of sexual violence.