Colombia's Santos would win election, but support down - poll

Colombia's President Juan Manuel Santos addresses the audience during a public viewing of the urn containing the ashes of late Colombian Nobel laureate Gabriel Garcia Marquez in Mexico City, April 21, 2014. REUTERS/Henry Romero

BOGOTA (Reuters) - Colombia's President Juan Manuel Santos remains frontrunner to win a second term in office in next month's election, but his two closest rivals are gaining ground, according to a poll published on Sunday.

Twenty-three percent said they would vote for the centre-right incumbent in the first round of voting on May 25, one percentage point less than in the last poll in March and five less than two months ago, according to the survey by Ipsos Napoleon Franco published in weekly Semana magazine.