"I don't expect to reach an agreement on a document," she told reporters on her plane. "They are going through some knotty discussions and I think those knotty discussions are going to continue for a while... I just want to help make sure that they are working in a straight line ahead." The joint document is key ahead of the international peace conference originally planned for the end of this month, BBC correspondent adds.--SPA www.spa.gov.sa/496393