US special envoy to Sudan said he hopes that global partners will put greater priority on the country's war and that more countries will step up at a donor conference in Paris on April 15.
An order, by Sudanese government effectively shuts down a crucial route for supplies to the vast Darfur region, controlled by the Rapid Support Forces.
Perriello will help coordinate US diplomacy and efforts with partners across Africa and the Middle East to end the war, humanitarian crisis and atrocities.