Kabore won with nearly 58 per cent of the vote, beating 12 opponents and claiming victory in the first round, said Newton Ahmed Barry, the commission's president.

Kabore received 1.6 million votes of the nearly 3 million cast, with voter turnout at 50 per cent, he said.

The opposition had hoped to split the vote and deprive Kabore of the 51 per cent needed for an outright victory and then form a coalition behind the strongest candidate for round two.

But leading candidate Eddie Komboigo, head of the Congress for Democracy and Progress, received 15 per cent and the other leading rival Zephirin Diabre from the Progress and Change Party, who lost to Kabore in 2015, received approximately 12 per cent.

The declaration comes four days after Sunday's election.

The opposition has accused the ruling party of foul play, including bribing people.

The process was "riddled with fraud" and the electoral commission was not up to the task of organising responsible elections, Tahirou Barry, an opposition candidate, told a press conference.

Australian Associated Press