Voters in Zimbabwe are going to the polls in the country's first election without the involvement of long-time leader Robert Mugabe.
The country's founding president, Mr Mugabe was ousted last year after almost four decades in power.
The main contenders in the presidential vote are incumbent Emmerson Mnangagwa, of the ruling Zanu-PF party, and opposition leader Nelson Chamisa.
Parliamentary and local elections are also taking place on Monday.
Polls give Mr Mnangagwa, thought to be 75, a narrow lead over his 40-year-old rival, who leads the MDC (Movement for Democratic Change) Alliance.
On Sunday ex-president Robert Mugabe - who first came to power after independence in 1980 - said he would not vote for his successor.
The country is expecting a high turnout of first-time voters, where the youth vote is expected to be key. Almost half of those registered are under the age of 35.
Hundreds of international observers have been deployed to ensure the vote goes smoothly, but the opposition has repeatedly alleged irregularities in the voter roll.
They have also expressed concern over the security of ballot papers and voter intimidation in mainly rural areas.
The election follows decades of repressive rule which has brought severe economic challenges to Zimbabwe.
These include issues of investment, education, healthcare and jobs - some estimates suggest that the unemployment rate is as high as 90%.
President Mnangagwa, who is known as "the crocodile" because of his political shrewdness, has promised to deliver jobs and is seen as open to economic reforms.
He has survived several assassination attempts blamed on supporters of Mr Mugabe.
The 'crocodile' who snapped back
The crusader taking on Zimbabwe's 'crocodile'
Have Zimbabwe's generals turned into democrats?
Mr Chamisa, who became an MP at the age of 25, could become Zimbabwe's youngest president if elected.
He has promised to rebuild the country's devastated economy, but been criticised for making extravagant promises - such as the introduction of a high-speed bullet train and bringing the Olympics to Zimbabwe.
But the qualified pastor will have been buoyed by comments Mr Mugabe made during a surprise news conference on Sunday.