The leaders of Sudan and of its semi-autonomous southern region say they have reached a deal on the terms of a referendum on independence. The bill was one of four issues at the heart of crisis talks between President Omar al-Bashir and Salva Kiir. After four days, the pair has reached agreement on three of the points, they said. Details have yet to be given. The two decade-long war between North and South ended in 2005, but the peace process has been looking shaky. The two leaders fought each other during the civil war and have been uneasy partners since a peace deal was signed in 2005. Elections are due in April next year and in 2011 the South will vote in a referendum on possible independence. 'End of crisis' Representatives of Mr Kiir's party, the former Southern rebels of the SPLM, and the ruling National Congress Party held a joint news conference to announce the new deal hammered out in Khartoum.