VOTE RIGGING
Mbeki's trip follows a June 27 runoff election, in which Mugabe was the only candidate after Tsvangirai pulled out citing state-sponsored violence against MDC candidates and supporters.
"We will of course engage the AU (African Union) and I am quite certain that they will make their own contribution to move the process forward," said Mbeki.
A White House official said on Saturday that Zimbabwe was certain to come up at the Group of Eight summit in Japan on July 7-9, which will also be attended by the heads of seven African states.
"I think the G8 will strongly condemn what Mugabe has done," Dennis Wilder, a senior National Security Council official, told reporters aboard Air Force One as President George W. Bush was on his way to Japan.
"It will strongly condemn the legitimacy of his government and his governing of Zimbabwe."
Justice Minister Patrick Chinamasa, who leads the ZANU-PF negotiating team, criticised Tsvangirai for failing to attend Saturday's meeting, accusing him of behaving like a rebel.
"I think that what is becoming clear is that if the country is not careful it will be precipitated into a period of instability," Chinamasa told state television.
A film secretly taken by a Zimbabwe prison guard and smuggled out of the country shows rigging that took place for the June 27 run-off vote, the Guardian newspaper said on Saturday.
The film taken by Shepherd Yuda using a camera supplied by the Guardian showed prison staff being told by a war veteran how to fill in their ballot papers for Mugabe.
