(COMBO) This combination of pictures created on June 03, 2021 shows a file photo taken on May 01, 2021 of Peruvian presidential candidate, right-wing Keiko Fujimori (L), speaking during a debate with leftist Pedro Castillo (out of frame) in Chota, Cajamarca, northern Peru, ahead of the June 6 presidential runoff election, which threatens to polarize the country and a file photo taken on May 30, 2021 of Peruvian presidential candidate, socialist Pedro Castillo, during the last debate with his opponent, right-wing candidate Keiko Fujimori, ahead of the June 6 run-off election, in Arequipa, Peru. Peru votes on June 6, 2021 in its fifth presidential election in three years after an unprecedented series of crises and corruption scandals that saw three different leaders in a single week. (MARTIN MEJIA, CESAR BAZAN / X07403 / AFP)

An Ipsos poll on Saturday afternoon showed Peru's runoff presidential election still locked in a statistical tie, but right-wing candidate Keiko Fujimori is slightly ahead of leftist Pedro Castillo, by a 0.7 percentage point margin.

Peruvians will head to the polls on Sunday in a bitterly divisive election that has pitted Fujimori, the daughter of jailed ex-President Alberto Fujimori, against Castillo, a little-known elementary school teacher.

Peruvians will head to the polls on Sunday in a bitterly divisive election that has pitted Keiko Fujimori, the daughter of jailed ex-President Alberto Fujimori, against Pedro Castillo, a little-known elementary school teacher

Voters are divided by class and geography, with urban and higher-income Peruvians leaning toward Fujimori, and poorer, rural Peruvians leaning toward Castillo.

The Ipsos poll, which was conducted on Saturday and seen by Reuters, puts Fujimori at 44.8 percent of the vote and Castillo at 44.1 percent of the vote. Another 11.1 percent of voters would not vote for either candidate.

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Ipsos said the poll had a margin of error of 1.4 percentage points and a sample size of 5,117.

Ipsos follows two other pollsters who have now put Fujimori slightly ahead, although still in statistical-tie territory.

Pollster IEP Saturday morning put Fujimori 0.1 percentage point ahead of Castillo, according to the results seen by Reuters. A poll on Friday by pollster CPI had Fujimori 0.2 percentage point ahead.

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The race remains too close to call and all polls show a statistical tie, but Saturday's polls show Fujimori's best performance so far.

It is illegal within Peru to publish polls during the last week before a presidential election, although the surveys can be carried out as long as local media do not publish them.