June 26 (Reuters) - Following are latest developments in Zimbabwe:

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** President Robert Mugabe rejected African calls to postpone a presidential election on Friday, saying there could be no interference in his country even from the African Union.

** The United Nations' top human rights official, Louise Arbour, said political violence in Zimbabwe had corrupted the electoral process and created a "perversion of democracy."

* Opposition Movement for Democratic Change (MDC) leader Morgan Tsvangirai said there could be no negotiations with Mugabe if he went ahead with a one-man election on Friday.

* Tsvangirai said if Mugabe declared himself president and extended his 28 years of uninterrupted rule he would be shunned as an illegitimate leader who killed his own people.

* The United States said Mugabe's government should accept the MDC's offer to talk.

* A court released MDC Secretary-General Tendai Biti on bail after two weeks in jail on treason charges.

* Tsvangirai said South African President Thabo Mbeki must act urgently to help end the crisis.

* Zimbabwean police said Britain and the United States were backing what it said were plans by the MDC and some NGOs to disrupt the June 27 vote with violence, including burning down voting tents.

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