LIMA, June 18 (Reuters) - Right-wing candidate Keiko Fujimori was on track on Thursday to win Peru's presidency by a narrow but growing margin, with only 0.6% of votes left to be reviewed, while leftist rival Roberto Sanchez called for protests after alleging irregularities at the electoral authority.
Fujimori, making her fourth bid for the presidency, held a lead of 39,115 votes in a count that has kept Peru on edge since the June 7 runoff.
