LIMA, Peru — Leftist military man Ollanta Humala claimed victory Sunday night and pledged to honor the free market but put Peruvians first, after unofficial results showed him narrowly winning a bitterly contested presidential runoff against the daughter of disgraced former President Alberto Fujimori.

Humala had promised the poor a greater share of Peru's mineral and natural wealth and reiterated his vow to convert the Andean nation's economic bonanza into "the great motor of the social inclusion Peruvians desire."

Humala won 51.5 percent of the vote against 48.5 percent for Keiko Fujimori with all ballots counted, according to the independent election watchdog Transparencia, whose track record in previous elections is solid.

First official results, with 78 percent of the vote counted, had the race much closer, with Humala ahead with 50.1 percent. But officials cautioned that the count was light on rural districts where Humala fared better.