Bolivia is set to elect a non-left wing president after nearly two decades of near-continuous rule by the incumbent socialist party, according to official preliminary results.
Senator Rodrigo Paz Pereira and former president Jorge Quiroga came in first and second place respectively in Sunday's presidential elections.
Neither received a high enough share of the vote to secure an outright win, so the vote will go to a run-off between these two candidates, due in October.
Paz Pereira, of the Christian Democratic Party, was a surprise vote leader, after opinion polls had suggested Samuel Doria Medina, a businessman, was the frontrunner.
The electoral authorities said it can take up to three days to finalise the results.
