Peru's right-wing presidential candidate Keiko Fujimori on Monday raised allegations of "irregularities" and "signs of fraud" in Sunday's election as her rival, far-left trade unionist Pedro Castillo, took a razor-thin lead in the vote count. Fujimori had led early counting, but school teacher Castillo gained ground as votes from Peru's rural areas -- his stronghold -- came in in a country battered by years of political turmoil. fj/lda/bgs/je