The long-awaited announcement of the results of last week's DR Congo presidential election, promised for Sunday, will be postponed to next week, the head of the electoral commission announced on Saturday. "It is not possible to publish the results on Sunday. We are making progress, but we do not have everything yet," said commission president Corneille Nangaa. An exact new date has not been announced. Last Sunday's DR Congo presidential election has proved most divisive. The United Nations Security Council is split over how to react to this election process, according to an internal report. The United States also condemned a lack of transparency, while China, a major investor in DR Congo, lauded the process. The election to pick a successor to President Joseph Kabila, who has ruled the country of 80 million people since his father was assassinated in 2001, should mark the first democratic transition of power since independence from Belgium in 1960. But tensions have risen since the vote after observers reported a litany of irregularities that the opposition says is part of the ruling party's effort to steal it. Worried that the dispute could spark the kind of violence seen after the 2006 and 2011 elections, the Security Council met on Friday to discuss how to react.