A "campaign of destruction" in October by Sudanese rebels against non-Arab communities in and near a city in Sudan's western region of Darfur shows “hallmarks of genocide,” U.N.-backed human rights experts reported Thursday, a dramatic finding in the country's devastating war. The Rapid Support Forces carried out mass killings and other atrocities in el-Fasher after an 18-month siege during which they imposed conditions “calculated to bring about the physical destruction" of non-Arab communities, in particular the Zaghawa and the Fur communities, the independent fact-finding mission on Sudan reported. U.N. officials say several thousand civilians were killed in the RSF takeover...