New Delhi, June 10 -- Colombian presidential candidate Abelardo de la Espriella on Tuesday urged prosecutors to investigate whether rebel groups coerced citizens in remote municipalities into voting for governing party candidate Sen. Ivan Cepeda during the May 31 first-round presidential election.

De la Espriella's campaign issued a statement saying that Cepeda secured more than 70% of the vote across 109 municipalities with active illegal armed groups, reaching as high as 97% in some locations. Cepeda's camp didn't immediately respond to the accusations.

Cepeda, an ally of President Gustavo Petro and a former member of Colombia's communist party, has acted as a mediator between Colombia's government and Marxist rebels. In the first rou...