South Sudan foes agree to withdraw forces from 'urban areas' South Sudan's government and rebels agree to withdraw troops from urban areas, as they signed a security deal aimed at ending a four-and-a-half year war. The agreement comes days after South Sudanese arch-foes President Salva Kiir and rebel leader Riek Machar agreed a permanent ceasefire, raising hopes of an end to the conflict that has devastated the world's youngest country. IMAGES AND SOUNDBITE