Washington, 12 Dhu-AlQa'dah, 1436,August 27, 2015, SPA -- Secretary-General of the United Nations Ban Ki-moon welcomed the signing of South Sudan President Salva Kiir an agreement to end the conflict in southern Sudan , he described the signing as an important and necessary step to end the conflict. He commended the mediation efforts made by IGAD and its tireless efforts for the success of peace talks. He urged the parties to work in good faith to implement its provisions and the start of a permanent ceasefire and to allow freedom of movement for the United Nations and humanitarian workers. 19:06 LOCAL TIME 16:06 GMT www.spa.gov.sa/w