Salva Kiir, South Sudan's president, has held bilateral talks with Sudanese President Omar al-Bashir in Khartoum to discuss the outstanding issues that remain following secession in 2011. Following the meeting, al-Bashir lifted a threat to block South Sudan's oil exports. The two sides also agreed to implement a peace deal signed last year. Al Jazeera's Harriet Martin reports from Khartoum.