June 25 (Reuters) - Following are latest developments in Zimbabwe: ** Denotes new or updated item: ** Former South African President Nelson Mandela expresses concern over the crisis and criticises Zimbabwe's leadership. ** U.S. President George W. Bush calls run-off election a "sham". * Britain's foreign ministry advises against travel to Zimbabwe. * Three hundred Zimbabweans seek refuge at the South African embassy in Harare, a South African government spokesman said. * Britain strips President Robert Mugabe of honorary knighthood. * Leaders of a security troika of the Southern African Development Community (SADC) called for a postponement of Zimbabwe's run-off election, saying conditions were not conducive to a fair poll. * A top South African negotiator is in Zimbabwe to broker talks that will consider all options, including postponement of the election. * Zimbabwe's electoral commission said that the opposition's withdrawal from June 27 run-off has no legal effect and the vote will go ahead. * Zimbabwe election monitors said they could not effectively observe the presidential vote because of threats to their safety. * Opposition leader Morgan Tsvangirai said the African Union, backed by the United Nations, should lead a transitional process in Zimbabwe following disputed elections and violence. * Tsvangirai said his opposition MDC would not enter negotiations with President Robert Mugabe's government if the run-off election goes ahead. * Tsvangirai spoke from his home, which he visited for a short time before returning to the Dutch embassy, where he has taken refuge. * The England and Wales Cricket Board (ECB) cancelled Zimbabwe's tour of England next year under instructions from the British government. * Britain said it is preparing intensified sanctions, financial and travel sanctions, against named members of the Mugabe regime. * Tsvangirai said President Robert Mugabe has "declared war" not an election in Zimbabwe. * Armed Zimbabwean police cordoned off and raided the MDC office in the eastern city of Mutare. Nobody was arrested.
Zimbabwe's main opposition Movement for Democratic Change (MDC) leader Morgan Tsvangirai (C) addresses during a press briefing at his residence, shortly after leaving the Dutch embassy in Harare in Harare, June, ...
