Peruvian socialist presidential candidate Pedro Castillo slipped again in opinion polls on Friday, creating what appeared to be a stalemate against right-wing Keiko Fujimori two days before Sunday’s run-off election.

In an Ipsos poll seen by Reuters, Castillo led by 0.9 percentage point, while a CPI poll, also seen by Reuters, had Fujimori ahead by 0.2 percentage point, the first time that the right-wing candidate led her left-wing rival.

The highly polarized election pits Fujimori, the daughter of jailed ex-president Alberto Fujimori, against Castillo, an elementary school teacher and little-known union leader who campaigned on a socialist platform.

Polls have shown Fujimori is catching up to his current statistical tie with Castillo, who has been the favorite since the first round of voting in April.

The Ipsos poll had a 2.8% margin of error while the CPI poll had a 2.5% margin of error.

It is illegal in Peru to publish polls in the week leading up to a presidential election, although these polls can still be taken until the local media publish them.

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