HARARE — Zimbabweans cast their ballots Monday in the country’s first election since authoritarian leader Robert Mugabe was ousted last year, with concerns over fraud and the likelihood of a disputed result clouding voting day.

President Emmerson Mnangagwa, Mugabe’s former ally in the ruling ZANU-PF party, faces opposition leader Nelson Chamisa of the MDC (Movement for Democratic Change) in a historic vote for the southern African nation.

“I just have to do this. I have to see a better Zimbabwe for my kids. Things have been tough,” Tawanda Petru, 28, an unemployed man voting in Mbare, a low-income district of the capital Harare, told AFP as polling stations opened across the country.

Mugabe, 94, who was ousted by the military in November, made a surprise intervention on the eve of the elections, calling for voters to throw ZANU-PF out of office.

Zimbabwe’s generals shocked the world last year when they seized control and ushered Mnangagwa to power after Mugabe allegedly tried to position his wife Grace to be his successor.

Mnangagwa, 75, who promises a fresh start for the country despite being from the ZANU-PF elite, is the front-runner with the advantage of covert military support, a loyal state media and a ruling party that controls government resources.

But Chamisa, 40, who has performed strongly on the campaign trail, hopes to tap into a young population that could vote for change.