A voter arrives to a polling station guarded by police in Tacabamba, Peru, Sunday, June 6, 2021. Peruvians vote Sunday in a presidential run-off election to choose between Pedro Castillo, a political novice who until recently was a rural schoolteacher, and Keiko Fujimori, the daughter of jailed ex-President Alberto Fujimori. (AP Photo/Martin Mejia)

Presidential candidate Pedro Castillo talks to reporters at his hometown in Chugur, Peru, Sunday, June 6, 2021. Peruvians will head to the polls Sunday in a presidential run-off election to choose between Castillo, a political novice who until recently was a rural schoolteacher, and Keiko Fujimori, the daughter of jailed ex-President Alberto Fujimori. (AP Photo/Martin Mejia)

Presidential candidate Pedro Castillo waves after voting in Tacabamba, Peru, Sunday, June 6, 2021. Peruvians vote Sunday in a presidential run-off election to choose between Castillo, a political novice who until recently was a rural schoolteacher, and Keiko Fujimori, the daughter of jailed ex-President Alberto Fujimori.(AP Photo/Martin Mejia)

Presidential candidate Pedro Castillo waves to supporters after voting in Tacabamba, Peru, Sunday, June 6, 2021. Peruvians vote Sunday in a presidential run-off election to choose between Castillo, a political novice who until recently was a rural schoolteacher, and Keiko Fujimori, the daughter of jailed ex-President Alberto Fujimori.(AP Photo/Martin Mejia)

A voter casts her ballot during a run-off presidential election in Lima, Peru, Sunday, June 6, 2021. Peruvians vote Sunday to choose between Keiko Fujimori, the daughter of jailed ex-President Alberto Fujimori, and Pedro Castillo, a political novice that until recent was a rural schoolteacher. (AP Photo/Guadalupe Pardo)

Presidential candidate Keiko Fujimori greets a woman upon her arrival to a breakfast with supporters in Lima, Peru, Sunday, June 6, 2021. Peruvians head to the polls Sunday in a presidential run-off election to choose between Fujimori, the daughter of jailed ex-President Alberto Fujimori, and political novice Pedro Castillo. (AP Photo/Guadalupe Pardo)

A child stands behind a barricade as supporters of Presidential candidate Keiko Fujimori watch her arrive to cast her vote in Lima, Peru, Sunday, June 6, 2021. Peruvians head to the polls in a presidential run-off election to choose between Fujimori, the daughter of jailed ex-President Alberto Fujimori, and political novice Pedro Castillo. (AP Photo/Guadalupe Pardo)

Children applaud as presidential candidate Pedro Castillo walks along Tacabamba, Peru, after voting Sunday, June 6, 2021. Peruvians vote Sunday in a presidential run-off election to choose between Castillo, a political novice who until recently was a rural schoolteacher, and Keiko Fujimori, the daughter of jailed ex-President Alberto Fujimori.(AP Photo/Martin Mejia)

Backers of presidential candidate Keiko Fujimori wave Peruvian flags waiting for her arrival to a breakfast at the San Juan de Lurigancho neighborhood in Lima, Peru, Sunday, June 6, 2021. Peruvians vote Sunday in a presidential run-off election to choose between Fujimori, the daughter of jailed ex-President Alberto Fujimori, and Pedro Castillo, a political novice that until recent was a rural schoolteacher. (AP Photo/Guadalupe Pardo)