Mexico's Federal Electoral Institute (IFE) confirmed Friday Enrique Pena Nieto's victory in last Sunday's presidential elections.

According to the final count results, Nieto, the candidate of the once-ruling Institutional Revolutionary Party (PRI), gained 38. 21 percent of the votes against 31.59 percent for his closest rival, Andres Manuel Lopez Obrador of the center-left Progressive Movement.

Josefina Vazquez Mota, presidential candidate of the ruling National Action Party (PAN), polled 25.41 percent to finish third. A fourth candidate, Gabriel Quadri de la Torre of the New Alliance Party (Panal), only gained 2 percent.

The results obtained after final count is consistent with the preliminary results provided by the IFE from the night of election day, through the quick count and the Preliminary Electoral Results Program.

Nieto declared victory late Sunday after the preliminary result released by the IFE gave him a comfortable six-point lead. The other candidates, with the exception of Obrador, conceded defeat.

A definitive count was to be announced Wednesday, but it was delayed after accusations of vote tampering from Obrador's camp led the IFE to reopen and recount ballot boxes from half of the more than 100,000 voting stations around the nation.

Throughout the week, dozens of people demonstrated outside the premises of the IFE to protest the outcome of the election, while Lopez Obrador called for a full recount of the ballots and vowed to contests the results at the Federal Electoral Tribunal of Judicial Power.

Obrador has denounced the elections as being "plagued by irregularities," including PRI overspending by more than twice the limit placed on campaigns, biased media coverage, vote buying and coercion. Even if proved true, the accusations are not expected to nullify the result.

The PRI was voted out of power in 2000 after ruling Mexico for 71 consecutive years.

PRD Senator Pablo Gomez accused the PRI of having forged an electoral fraud practices such as vote buying.

In the coming days, the councils of the IFE will perform the district counts of the elections for deputies and senators, who will form a new Legislature on September 1.