Voters in Chile will decide between a Socialist single mother and a conservative businessman in next month's presidential runoff election after no candidate won a majority of votes on Sunday.

Michelle Bachelet won nearly 46 percent in Sunday's voting. The pediatrician and former defense minister will face multi-millionaire Sebastian Pinera, who came in a distant second with 25 percent of the vote (with nearly all the votes counted).

Conservative Joquin Lavin, who finished third with 23 percent, says he will back Mr. Pinera in the runoff.

Ms. Bachelet could draw support from voters who cast their ballots for communist Tomas Hirsch, who came in fourth place with five percent of the vote.

Opinion polls suggest Ms. Bachelet will win the January 15 runoff to become Chile's first female president.

Some information for this report provided by AP and AFP.