JUBA, South Sudan –  

Officials say South Sudan and Sudan have failed to reach an agreement on security arrangements and oil exports after several days of talks in the Ethiopian capital, Addis Ababa.

The two sides were negotiating the implementation of a safe demilitarized border zone, which called on both Juba and Khartoum to withdraw their armies at least 10 kilometers (6 miles)from the contested border region.

South Sudan's negotiating team said in a statement Saturday a key sticking point has been the demilitarization of a contested 14-mile strip of land bordering Sudan's Darfur and South Sudan's Northern Bahr el Ghazal states.

South Sudan broke away from Sudan in 2011 after an independence vote under a 2005 peace treaty that ended decades of war, but disputes remain over their common border and sharing of oil revenues.