HARARE

Zimbabwe's main opposition leader Morgan Tsvangirai re-united with his former allies on Saturday to forge a coalition aimed at ending President Robert Mugabe's near four-decade hold on power in elections next year.

Mugabe, in power since independence from British colonial rule in 1980, has been endorsed as his party's candidate for next year's vote despite his advanced age at 93 and signs of failing health.

At a rally in the capital, the opposition Movement for Democratic Change (MDC) leader Tsvangirai told supporters he was joining forces with two former deputies to face down Mugabe's ZANU-PF party.

"For everything else to happen we have to unite as opposition parties," Tsvangirai said.

"We have travelled this journey together and we will complete it together. We are rising above this needless and unhealthy competition."

In 2008, Tsvangirai beat Mugabe in the first round of voting, but lost in a run-off marred by violence and intimidation including the killing of scores of opposition activists.

The opposition leader said he had agreed an alliance with former deputy Welshman Ncube and close aide Tendai Biti, as well as four other opposition factions.

"This coalition is to stop fragmentation. Mugabe will have no excuse to rig (the election) if we are united," he said Saturday.

Among the signatories is the Zimbabwe People First party led by war veteran and former diplomat Agrippa Mutambara.

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