Ahmad al-Jarba, leader of the Syrian National Coalition (SNC), Syria's main political opposition group, points his finger during a press conference in Geneva, Switzerland, Thursday, Jan. 23, 2014. Al-Jarba announced that the Syrian peace talk negotiations will be difficult and that Syrian President Bashar al-Assad is now part of the past. (AP Photo/Anja Niedringhaus)
(CNN) -- The South Sudanese government and rebels signed a ceasefire deal on Thursday after more than a month of fighting, according to the Intergovernmental Authority on Development, an East African trade bloc that has been helping to mediate between the parties.
The government and the rebels reached the agreement in Ethiopia's capital, Addis Ababa.
South Sudan erupted in violence on December 15 when rebels loyal to ousted Vice President Riek Machar tried to stage a coup. Violence quickly spread, with reports of mass killings emerging nationwide.
South Sudan seceded from Sudan in 2011 after decades of war, making it the world's youngest nation.
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