ADDIS ABABA, Ethiopia (AP) — The leaders of Sudan and South Sudan have not yet reached a deal on where their shared border lies.

Talks between Sudan President Omar al-Bashir and South Sudan President Salva Kiir were expected to continue for a third day Tuesday. No breakthrough was reached Monday.

El-Obeid Morawah, a spokesman for Sudan's foreign ministry, said Tuesday would be the last day of talks. The two sides reached an oil-sharing agreement in August but need to agree on their border and control of the Abyei region.

The U.N. Security Council has threatened sanctions if the sides don't resolve their differences.

South Sudan split from Sudan last year after an independence vote, the culmination of a 2005 deal ending decades of war. The two came to the brink of war earlier this year.