Zimbabwe's opposition has called on South African President Thabo Mbeki to stand down as a mediator in the wake of the elections crisis.
MDC leader Morgan Tsvangirai told the BBC Mr Mbeki should be replaced by Zambian President Levy Mwanawasa.
Mr Tsvangirai also hinted he could put President Robert Mugabe on trial for what he described as the suppression of people who voted against him.
Is the situation in Zimbabwe beyond African diplomacy? Who should mediate the Zimbabwe crisis? Should the security council intervene? When is it right for the international community to get involved and what can it do?