Zimbabwe set for opposition rally

The Movement for Democratic Change says its leader, Morgan Tsvangirai, plans to attend the march, which comes ahead of a presidential run-off vote on Friday.

President Robert Mugabe has accused the MDC of lying about political violence.

South Africa has sent two mediators in what a BBC correspondent says may be a final effort to prevent the poll.

No-one, including South African President Thabo Mbeki, thinks the election is going to be free or fair, or will help solve Zimbabwe's problems, says the BBC's Peter Biles in Johannesburg.

Mr Mbeki was in Harare himself only a few days ago, where he tried to persuade both Mr Mugabe and Mr Tsvangirai to set up a government of national unity instead.

Secret campaign

The opposition plans to decide on Monday whether to compete in the election at all, fearing a further escalation in violence and saying it is nearly impossible to campaign.

The MDC has filed court appeals against police bans on a series of opposition gatherings.