SAN JOSE - Carlos Alvarado, the candidate from the ruling Citizen Action Party (PAC), won Costa Rica's presidential runoff with 60.66 percent votes, preliminary results released by Supreme Electoral Tribunal (TSE) on Sunday evening showed.

With 90.62 percent ballots counted, Carlos Alvarado gained 60.66 percent of the vote, and his rival, Fabricio Alvarado, an evangelical candidate from the National Restoration Party (PRN), obtained 39.34 percent of the vote, according to the results.

Fabricio Alvarado has campaigned on the pledge to rescue "principles and values" by opposing gay marriage.

Carlos Alvarado has come out in favor of gay marriage and has slammed Fabricio Alvarado for campaigning on a single issue, without having a plan for the government.