May 31 (UPI) -- Colombian presidential candidate Gustavo Petro said there is evidence of voter fraud after the country went to the polls this week.
Petro, a socialist candidate, finished second in the vote with 25 percent and will face conservative candidate Ivan Duque, who was first with 39 percent, in a runoff next month. But Petro's campaign said it found dozens of ballots that appear to have been altered to favor Duque.