Harare: South African President Thabo Mbeki, mediating in Zimbabwe's post-election crisis, will go to Harare on Saturday amid growing optimism a power-sharing deal can be reached between the ruling party and the opposition.

South Africa's Foreign Ministry said Mbeki would meet President Robert Mugabe and Movement for Democratic Change (MDC) President Morgan Tsvangirai.

ZANU-PF and MDC began talking more than two weeks ago to resolve a crisis that came to a head after the 84-year-old Mugabe was re-elected in a widely condemned June poll boycotted by the opposition.

South Africa's Business Day newspaper, citing unnamed sources, said Mugabe and Tsvangirai would hold make-or-break talks to finalise a deal in Harare on Sunday.

Business Day said it was understood the two were not "too far apart", though the central issues remain unresolved.