HARARE (AFP) - South African President Thabo Mbeki left Harare for Angola on Wednesday after talks on Zimbabwe's political crisis broke up to allow the main Opposition leader "time to consider". His departure followed claims by a ruling ZANU-PF party official that Zimbabwe President Robert Mugabe had reached a deal with a smaller Opposition faction, excluding main opposition leader Morgan Tsvangirai. After mediating three days of talks between the rivals in the Zimbabwean capital, Mbeki said he knew of no deal being signed, adding that he remained confident all three sides could find an agreement. "We have dealt with all the elements on which President Mugabe and Mutambara agree, but there is disagreement on one element over which Morgan Tsvangirai had asked for time to reflect," Mbeki said. "We have adjourned to give Morgan Tsvangirai more time to consider these matters. "I'm quite confident they will resolve all their outstanding matters which would result in this inclusive government, and in the second instance then acting together," Mbeki told reporters. Welshman Ncube, Secretary-General for Mutambara's faction, emphasised that "no deal has been signed by anyone. Dialogue is still continuing." Mbeki met Angolan President Jose Eduardo dos Santos on Wednesday in Luanda, Angolan state radio reported, and was expected to return to South Africa afterwards ahead of a summit of regional leaders this weekend. He was to "give a report to the Southern African Development Community (SADC) chairman of defence and security, President Jose Eduardo dos Santos," said Mbeki spokesman Mukoni Ratshitanga. "After that we are going back home." Mbeki has been appointed mediator for the Zimbabwe crisis by SADC, a 14-nation regional bloc, and had arrived in Harare over the weekend for negotiations between Mugabe, Tsvangirai and Mutambara. "The talks are adjourned, not ended, but I wouldn't say until when. Tsvangirai needs more time to consult," Mbeki's spokesman told AFP. Asked earlier whether signatures had been put to a deal, Mbeki said, "I wouldn't know about it. We are facilitating discussions among three parties." Tsvangirai finished ahead of Mugabe in the March first round of the presidential election but boycotted the run-off in June, saying dozens of his supporters had been killed and thousands injured. Power-sharing talks began after the rivals signed a deal on July 21 laying the framework for negotiations, leading to more than two weeks of discussions in South Africa between representatives of the three sides. Mbeki is expected to brief regional leaders on the state of the Zimbabwe talks at the SADC summit this weekend in Johannesburg. On Tuesday, Human Rights Watch called on southern African leaders to put pressure on Mugabe to end political violence in order to resolve the country's crisis. Tsvangirai believes his first-round total gives him the right to the lion's share of power. The ruling ZANU-PF party has insisted Mugabe must be recognised as president in any deal, as he won the June vote. Negotiations have reportedly included proposals for Mugabe, who has ruled since independence from Britain in 1980, to take on a more ceremonial role in exchange for amnesty from prosecution, with Tsvangirai being made executive prime minister.