Bolivia's presidential election is heading to a runoff after Sunday's vote ended over two decades of ruling party dominance.

Early results in Bolivia's presidential election show the country headed for an unprecedented runoff following a vote in which a dark horse centrist, Sen. Rodrigo Paz, drew more votes than the right-wing front-runners, although not enough to secure an outright victory.

Bolivians have headed to the polls for a pivotal election that could end the long reign of the leftist Movement Toward Socialism party.