AU to broker troop withdrawal from Sudan, S.Sudan border
Week-long negotiations in Khartoum failed to reach an agreement on how to withdraw their armies
TIMELINE: Human rights in 2012 - Amnesty
Human rights have taken a battering in 2012, an Amnesty timeline of key abuses shows
Sudan police teargas protesters after student deaths
Sudan has avoided the mass protests that unseated rulers in Tunisia, Egypt and Libya last year, but rising food prices and other grievances have inspired smaller demonstrations