There was no outright winner in Peru’s presidential election.

Exit polls showed that Keiko Fujimori, daughter of an ex-president jailed for massacres, led two other  candidates in the election  on Sunday but she was unable to muster enough margin to avoid a runoff in June.

Fujimori won 37.8 percent of the vote according to a survey by Ipsos and 39.1 percent according to another pollster, CPI — short of the majority needed to win outright.

Her two nearest rivals were virtually tied in second place in the Ipsos poll with 20.9 percent for center-right candidate Pedro Pablo Kuczynski and 20.3 percent for left-wing lawmaker Veronika Mendoza.

CPI gave Kuczynski a thin lead in second place with 19.7 percent to 18.8 percent for Mendoza.

Official results expected over the coming hours will determine which of them will face Fujimori in a runoff on June 5.

Some 23 million Peruvians were called to vote in an election marred by alleged vote-buying and deadly attacks.

The 40-year-old daughter of former leader Alberto Fujimori survived attempts to ban her from the race and mistrust over her father’s legacy to top the polls in her bid to become Peru’s first female leader.

Observers complained that the electoral process was undermined when half the candidates dropped out or were excluded from the running under a tough new electoral law.

Fujimori and other leading candidates were accused of wooing voters with gifts. She and Kuczynski were cleared of the charges.