Emmerson Mnangagwa
© AP Photo/Ben CurtisEmmerson Mnangagwa and his wife Auxillia arrive at the presidential inauguration ceremony in the capital Harare, Zimbabwe, on Friday.
Emmerson Mnangagwa was sworn in on Friday as president of Zimbabwe in front of thousands of cheering supporters at Harare's national stadium, bringing the final curtain down on the 37-year rule of Robert Mugabe.

Taking his oath of office, the former security chief known as "The Crocodile" vowed to uphold the constitution of the former British colony and protect the rights of all Zimbabwe's 16 million citizens.

Even though most Zimbabweans celebrated the exit of Mr Mugabe (93), who presided over the descent into penury and despotism of one of Africa's brightest prospects, some are worried about the future under Mr Mnangagwa (75).

In particular, they question his role in the so-called Gukurahundi massacres in Matabeleland in 1983, when an estimated 20,000 people were killed in a crackdown on Mugabe opponents by the North Korean-trained Fifth Brigade.

Mr Mnangagwa has denied any part in the atrocities and since his return to Zimbabwe after two weeks in hiding has been preaching democracy, tolerance and respect for the rule of law.

"The people have spoken. The voice of the people is the voice of God," he told thousands of supporters on Wednesday at the headquarters of his ruling ZANU-PF party.

However, the army's rough treatment of Mugabe loyalists - former finance minister Ignatius Chombo was hospitalised because of beatings sustained in military custody, his lawyer said - has not allayed concerns about Mr Mnangagwa's real views of democracy.

"It was a very brutal and draconian way of dealing with opponents," Mr Chombo's lawyer, Lovemore Madhuku, told Reuters.

Oldest head of state

Mr Mugabe, the world's oldest serving head of state, resigned on Tuesday as parliament started to impeach him, a week to the day after the army stepped in to seize power.

Mr Mnangagwa assured Mr Mugabe he and his family would be safe in Zimbabwe when the two men spoke for the first time since Mr Mnangagwa returned home this week, the state-owned The Herald newspaper reported on Friday.

Rebuilding a shattered economy and restoring investor confidence will be at the top of the agenda for Mr Mnangagwa, who carries his own baggage after decades of service to Mr Mugabe, who was widely accused of resorting to human rights abuses and election-rigging.

Mr Mnangagwa earned the nickname "Ngwena", Shona for crocodile, an animal famed and feared in Zimbabwean lore for stealth and ruthlessness.

He backed Mr Mugabe's economic nationalism, especially a drive to force foreign firms to hand majority stakes to local blacks, suggesting he may not be the pro-market pragmatist many investors have been hoping for.

The opposition Movement for Democratic Change said it was cautiously optimistic a Mnangagwa presidency would not "mimic and replicate the evil, corrupt, decadent and incompetent Mugabe regime".

Zimbabwe's bourse, which had been on a rapid rise, lost $6 billion during this month's military intervention as its main index fell by 40 per cent. Analysts say it will fall even further before recovering. -Reuters