Mozambique's incumbent President Filipe Nyusi has taken an early lead in the country's presidential poll, preliminary results show.

The 60-year-old has garnered 68.85 percent of the votes counted so far, while his main challenger Osuffo Momade has managed 26.20%.

The votes counted so far account for about 39 percent of the country's 13 million registered voters.

Momade's Renamo party has however alleged fraud in the elections, saying Presidet Nyusi's Frelimo party engaged in malpractises.

Renamo held a press conference earlier on Saturday issuing a statement accusing Frelimo of violating the country's peace accord.

Prior to the election, the two parties signed a peace deal in August that formally ended hostilities, some three decades after a 15-year civil war that killed around one million people.

Mozambique's political scene has been dominated by Frelimo since the country ushered in a new multi-party system in 1990.

The Tuesday polls were seen as crucial for the country's future stability.

Renamo said it would hold a meeting on Monday to decide on what steps it would take.