BBC news with Nick Kelly.

The Presidents of Sudan and South Sudan have began direct talks aimed at resolving differences that took them to the brink of war earlier this year. South Sudan became independent from Sudan last year following a peace deal that ended decades of civil war. James Copnall reports from Addis Ababa.

South Sudan's President Salva Kiir told state media he hopes for a celebration after meeting Sudan's President Omar al-Bashir. Negotiating teams say they made progress on several of the outstanding issues before the heads of state arrive, but several blockages remain. The topics on the table included demilitarized buffer zone, exact location of the border, oil and the disputed region of Abyei. The aim of the summit is to agree a comprehensive solution to all these difficult issues. This may not be possible, but both countries are under pressure come up with some thoughts of agreement. The UN has threatened sanctions and the deal would help the economies of both countries.

The Libyan army has issued a 48-hour deadline for all unauthorized armed militias to vacate state properties. Officials say one militia has already been dislodged from the complex on the road to the airport in the capital Tripoli. But BBC's Rana Jawad in Tripoli says the government will find it hard to disband the many militias that emerged in last year's conflict.

It's not a matter of militias being opposed to the government. It's much of militias and brigades that don't feel they need to take orders from the government even though they support them on some level. They all want to control their own little patches whether it's small towns or cities. And the lack of a proper state authority structure allows them to grow in authority where they will rule.