La Paz, Aug. 18 -- Bolivia is heading to a presidential run-off between a Centrist and Right-wing candidate, marking the end of nearly two decades of government by the Movement for Socialism (MAS), the country's electoral council said.

With more than 91 per cent of ballots counted on Sunday night, preliminary results showed centrist Rodrigo Paz of the Christian Democratic Party (PDC) leading with 32.8 per cent of the vote. Conservative former interim President Jorge "Tuto" Quiroga, of the Alianza Libre coalition, trailed in second place with 26.4 per cent, meaning he will face Paz in a run-off on October 19. Candidates needed to surpass 50 per cent, or 40 per cent with a 10-point margin, to avoid a run-off.

Al Jazeera's Latin America ed...