President Omar al Bashir of Sudan and Salva Kiir of South Sudan are to meet in Adiss Ababa to discuss speeding up the implementation of a deal reached last September, according to BBC.

One of the most critical issues has been the halt in oil production in the land-locked South due to a disagreement over pipeline fees.

The oil is exported northwards to Sudan where it can be refined. But since the shutdown of operations, neither country has been able to reap any economic benefit from the oil.

Another point of contention is the flashpoint region of Abyei, which is claimed by both sides.