LIMA (Reuters) - Right-wing lawmaker Keiko Fujimori is slightly in front of left-wing former army officer Ollanta Humala a week before Peru's June 5 presidential election, a poll by survey firm Datum showed on Sunday.
Fujimori had 46.6 percent and Humala 42.5 percent of the overall vote in the poll.
When null and spoiled mock ballots were excluded in a nationwide survey, Fujimori had 52.3 percent of the vote while Humala had 47.7 percent.
The survey of 5,019 people from May 23-25 has a margin of error of 1.4 percentage points.
(Reporting by Patricia Velez and Terry Wade; editing by Philip Barbara)