U.N.-backed investigators say Sudan's paramilitary Rapid Support Forces have carried out a campaign in the city of el-Fasher in the Darfur region that shows "hallmarks of genocide" against non-Arab communities. The fact-finding mission says the group inflicted mass killings and starvation-like siege conditions that targeted the Zaghawa and Fur people. U.N. officials say thousands of civilians were killed and many others disappeared after the city fell to the paramilitary forces in late October. The team's report describes executions, rape, torture, abductions and selective targeting of women and girls. It said the violence looks planned, not chaotic. It calls for accountability and stronger civilian protection as the war spreads.