South Africa led efforts to block the dispatch of a UN envoy to Zimbabwe yesterday as the UN Security Council met on the election stand-off for the first time.

Diplomats said that South African opposition to a UN mission meant that the next step would probably be a public meeting of the 15-nation Security Council on Zimbabwe under Britain’s presidency in May.

Britain and other Western nations have been pushing for a greater UN role in resolving the month-old election crisis, since Gordon Brown, the Prime Minister, raised it at a UN summit on Africa this month.

The Security Council held a closed-door session in New York yesterday after Britain succeeded in pushing Zimbabwe on to its agenda under “other business”. Britain, backed by the US, France and other Western nations, called for the sending of a UN envoy and a moratorium on arms sales to Zimbabwe.

South Africa, China, Russia, Libya and Vietnam spoke up against any further Security Council action at this stage, diplomats said, with Burkina Faso saying that Africa should take the lead. A top official of Zimbabwe’s Movement for Democratic Change (MDC), which claims that it won the March 29 election, held private meetings with key UN members in New York yesterday to press for an envoy to be sent to the country.

Tendai Biti, the general-secretary of the MDC, travelled to New York to meet Security Council members separately, although South Africa, Russia and China appeared set to avoid him. He called for the UN to recognise the “illegality of the regime of Mugabe” and oversee a transfer of power to an MDC-led government of national unity.

A campaign of violence by government militias began a week after the poll when unofficial results showed a swing to the MDC, handing it control of parliament and the presidency to its leader, Morgan Tsvangirai. A recount ordered by the ruling Zanu (PF) party failed to overturn its parliamentary losses but all eyes remain on the presidential results, still unreleased a month after the poll.

Zimbabwe’s election commission moved to extend the disputed reign of Robert Mugabe yesterday when it postponed once again the verification of disputed results from last month’s presidential elections.

The UN Secretary-General said last night that he knew the outcome of the election, even though results have not yet been released. “It is just unacceptable that leaders of the Zimbabwe government have not yet released presidential results after four weeks. We know who is the winner,” Ban Ki Moon said.

Mr Ban's comments risked jeopardising any future role for the UN chief in mediating the election stand-off.

Times Recommends

• 'New York has lost its edge'
• Copenhagen will fail – and quite right too
• More than 17,000 new underwater species found