A Sudanese student died on Tuesday after police fired tear gas at Khartoum University protesters who have links to the Darfur region, police said in an emailed statement. Security forces had used tear gas and batons against around 200 students who organised a march at Khartoum University against escalating violence in Darfur which they blamed on the government, a Reuters witness said. Dozens have been killed in the region in recent weeks, where rebels have been fighting forces of President Omar Hassan al-Bashir. Bashir has stayed in power despite rebellions, U.S. trade sanctions, an economic crisis, an attempted coup and an indictment from the International Criminal Court on charges of masterminding war crimes in Darfur.

CAIRO (Reuters) - A home-made bomb exploded in front of the Israeli embassy in Cairo on Tuesday, but no one was hurt, security sources and the website of state-run Al-Ahram newspaper said. The office has not been used by Israeli diplomats for at least two years, following a September 2011 attack on the embassy. Security sources said the explosion targeted a police car parked nearby, rather than the embassy itself and did not cause any injuries. Egypt became the first Arab state to sign a peace treaty with Israel in 1979.

By Carl Odera JUBA (Reuters) - South Sudan charged four high-profile prisoners with treason on Tuesday, dashing rebel hopes that they would be released ahead of peace talks planned in Ethiopia this month. Rebels led by former vice president Riek Machar have demanded a pardon for the four politicians, all former members of the ruling SPLM party, before the peace talks resume.