Costa Ricans are heading to the polls Sunday to elect a new president.

Voters will choose their new president, who will replace Laura Chinchilla, their two vice presidents and the 57 members of Congress for the 2014-2018 period.

Participating in the electoral campaign are 13 presidential candidates, but just four are counted to be among the favorites - Johnny Araya, of the governing National Liberation Party; Jose Maria Villalta, of the leftist Broad Front; Luis Guillermo Solis, of the center-left Citizens Action Party; and Otto Guevara, of the rightist Libertarian Movement Party.

If none of the candidates garners more than 40 percent of the votes a run-off will be held between the two top vote-getters on April 6.

The country has been governed for two consecutive four-year terms by the National Liberation Party under Oscar Arias (from 2006 to 2010) and Chinchilla since 2010, and now it is seeking for the first time in its history to win a third consecutive mandate.

The polls, which are being monitored by about 100 international observers from different countries and entities such as the Organization of American States, or OAS, are scheduled to close at 6 p.m. EFE

Initial results are expected to be released at 8 p.m. EFE