efe-epaLa Paz

Bolivians are set to return to the polls for a presidential runoff that was triggered after none of the candidates managed to garner enough ballots to win the first round of voting on Sunday, according to preliminary results.

The Andean nation's incumbent president, Evo Morales, earned around 45.71 percent of the vote and his main rival, former president Carlos Mesa, obtained 37.84 percent, results showed after 83 percent of the votes had been counted. EFE-EPA