Zimbabwean President Emmerson Mnangagwa casts his vote for the presidential elections at the Sherwood Primary School in Kwekwe, Zimbabwe. Picture: AP Photo/Jerome Delay

Harare - Zimbabwe's President Emmerson Mnangagwa said on Tuesday that the ruling party was receiving "extremely positive" information from their representatives, a day after the first election since Robert Mugabe resigned following a bloodless coup.

Mnangagwa said on Twitter that he was delighted by the high voter turnout, which the Zimbabwe Electoral Commission put at 75 percent.

Counting began in Zimbabwe on Monday in the first election since the removal of Mugabe, a watershed vote that could pull a pariah state back into the international fold and spark an economic revival.

The election is a two-horse race between 75-year-old Mnangagwa, a long-time Mugabe ally, and 40-year-old Nelson Chamisa, a lawyer and pastor who is vying to become Zimbabwe's youngest head of state.

Mnangagwa is viewed as the frontrunner, though the latest opinion polls showed a tight race. There will be a runoff on September 8 if no candidate wins more than half the votes.