Zimbabwe's opposition rejects calls for a unity government, however, citing perceived bias of mediator, South African President Thabo Mbeki.
Even in Africa, pressure is mounting for Thabo Mbeki to increase pressure on Zimbabwe's president.
The African Union is expected to discuss the issue in Egypt Monday, one day after Mugabe declared a 'sweeping victory' in Friday's presidential runoff, which was widely condemned as a sham.
The South African statesman spoke critically in London about Robert Mugabe's crackdown.
The second round of presidential voting was marked by violence and intimidation. Voters could vote only for President Mugabe.