Ipsos Peru's latest poll placed Free Peru (PL) presidential candidate Pedro Castillo first with a 52.6 percent of votes advantage ahead of Popular Force (FP) leader Keiko Fujimori who secured 47.4 percent.
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Previously, the Ipsos Peru mock poll showed a difference of 1.9 percent among the runoff candidates and placed them in a technical tie. Now, the gap grew to 4.3 percent in votes cast.
In Lima, Fujimori maintains her preference, reaching 59.1 percent of the interviewees' votes. Castillo continues to be the favorite in rural areas, where he obtained 54.2 percent of the votes cast.
The Institute for Peruvian Studies (IEP) also released a poll, noting that both presidential candidates are in a technical tie (due to the margin of error) after Sunday's presidential debate.
IEP poll indicated that the leftist candidate had 40.3 percent of support, while the conservative FP representative gained 38.3 percent.
The research also showed that 13 percent of Peruvians would decide to vote blank or null. Regarding age groups, 45.8 percent of young people between 18 and 24 years of age support Castillo, while Fujimori's stronghold remains in Peruvians aged 40 and over (40.4 percent).
Election day is due on June 6, when citizens will decide this Andean nation's president for the next five years.