President Salva Kiir's government and the rebels backing Riek Machar have signed a ceasefire deal, a "critical first step" in peace negotiations.
Egypt's President Mohamed Morsi has declared a state of emergency in three of the country's cities after dozens of people were in killed in protests.
Protesters furious at an anti-Islam film have clashed with police near the US embassy in Cairo before a protest called by the Muslim Brotherhood.
Protesters have marched on US embassies across the Middle East over a film deemed insulting to the Prophet Muhammad.
President Mohamed Morsi has dismissed two top generals and quashed a military order curbing his powers, further stamping his authority on the country.
Speculation about Hosni Mubarak's health has riveted Egyptians since he was sent to jail, a reminder that his legacy still looms ahead of elections.
Former Egyptian president Hosni Mubarak, will hear a judge rule on whether he is guilty of graft and complicity in the killing of protesters.
Egyptians have queued patiently at polling stations nationwide to pick their leader for the first time in national history dating to the pharaohs.
Egyptian activists have called a mass rally in Cairo against the army's handling of protests that killed 17 people and drew international criticism.
Egyptians have gone to the polls in parliamentary elections after six days of violence in Cairo that has cast a pall over the transition to democracy.