Colombian presidential candidates cast votes

STORY: “It’s a relatively simple election: to leave things as they are in Colombia, which in my opinion means more corruption, violence and hunger, or to change Colombia and take it towards peace, prosperity and democracy for the people,” said Gustavo Petro after casting his vote in Bogota.

The current senator, leftist former mayor of Bogota and member of the M-19 guerrilla group has consistently lead opinion polls with around 40% support, 10 points below what he would need to secure the presidency without a June second round.

His main opponent is Federico 'Fico' Gutierrez, the center-right former mayor of Medellin, who has around 25% support.

Polling third in the six-way race is construction magnate and former mayor of Bucaramanga Rodolfo Hernandez, with about 20% support.