South Sudan's President Salva Kiir speaks during a rally in Bentiu, Unity state, south Sudan April 8, 2010. Kiir on Wednesday said Khartoum was delaying demarcating the north-south border to try to retain control over oil reserves with Sudan's elections just days away. Analysts say a failure to resolve the border issue between the former north-south foes could spark renewed conflict if the problem is not sorted before Africa's largest country holds a January 2011 referendum on independence for the south. REUTERS/Goran Tomasevic (SUDAN - Tags: ELECTIONS POLITICS)