ADDIS ABABA- South Sudan's government and rebels on Thursday signed a ceasefire agreement, pledging to halt fighting within 24 hours and end five weeks of bitter conflict that has left thousands dead.
The agreement was signed in the Ethiopian capital Addis Ababa by representatives of South Sudan's President Salva Kiir and rebel delegates loyal to ousted vice president Riek Machar, and was greeted by cheers from regional peace brokers and diplomats.
US President Barack Obama, whose country provided crucial backing on South Sudan's path to statehood, described the deal as "a critical first step toward building a lasting peace".
Mediators from the East African regional bloc IGAD, which has been brokering the peace talks, said the deal will put in place a verification and monitoring mechanism for the truce and allow unrestricted access to aid workers.
South Sudan's government also agreed to free 11 officials close to Machar who were detained after fighting between rival army units broke out on December 15, although no timeline for their release was given.
The status of the detainees had been a major sticking point in the talks and Obama stressed that their participation would be "critical" to any future dialogue.
The fighting has been marked by atrocities committed by both sides, and more than half a million people have been forced from their homes during a wave of ethnic violence in the impoverished nation.
Aid workers and analysts believe up to 10,000 people have died.