Keiko Fujimori won the first round of Peru's presidential election on Sunday, though the race to be her opponent in the June runoff was locked in a virtual tie between two contenders, three exit polls showed.

Ipsos gave Fujimori 37.8 percent of valid votes, Pedro Pablo Kuczynski 20.9 percent, and Veronika Mendoza 20.3 percent. GfK had similar results, while CPI gave Kuczynski a slightly better advantage, with 19.7 percent to Mendoza's 18.8 percent.

Fujimori, a U.S.-educated former congresswoman, would have needed 50 percent for an outright win. She set out early in her campaign to distance herself from her father, imprisoned former President Alberto Fujimori, after she narrowly lost her first presidential bid in 2011 to President Ollanta Humala.