Army soldiers again clashed with paramilitary Rapid Support Forces Sunday into the third week after the violence which has claimed at least 528 lives and wounded some 4,600. The UN warned that all of East Africa faced a humanitarian crisis. As food prices rocketed in Sudan, long bus convoys of refugees continued to cross the borders into Egypt, Chad, Ethiopia, the Central African Republic and South Sudan. The UK said it was too dangerous to continue evacuation flights for trapped Britons, the day after Indonesia managed to bring 363 nations home. Two Chinese naval vessels transported 940 Chinese citizens and 231 foreigners to a port in Jeddah, Saudi Arabia.