Peru's presidential vote, pitting right-wing candidate Keiko Fujimori against leftist rival Pedro Castillo, was a "positive electoral process" in which "serious irregularities" were not detected, the Electoral Observation Mission of the Organization of American States said Friday. "The Mission has not detected serious irregularities," said the preliminary report of the group headed by former Paraguayan foreign minister Ruben Ramirez. cm/fj/lda/acb/jm