Colombia's presidential election campaign closes

Colombia's presidential election campaign closed Sunday, a week before voters are scheduled to cast their ballot on May 25.Incumbent President Juan Manuel Santos called on Colombians to vote for him if they want to see the country at peace, after his administration began a peace process with FARC guerrillas in 2012.

The other candidates are the Democratic Center's Oscar Ivan Zuluaga, the Green Party's Enrique Penalosa, the left-wing Polo Democratic's Clara Lopez and the Conservative Party's Marta Lucia Ramirez.

Zuluaga convened a press conference to defend himself after Semana magazine revealed a video showing the candidate meeting an illegal hacker.

"The video is part of a vulgar political set-up that aims to smear our campaign and it is no coincidence that it was published when we lead the polls and the president-candidate is falling," Zuluaga said.

Penalosa ended his campaign with a bike ride through the Colombian capital city of Bogota, where he called on Zuluaga to renounce his candidacy over the video scandal, claiming Zuluaga lied to the country when he said he had no connection with the illegal hacker.

Lopez asked the courts to "do their job" and investigate cases of illegal infiltration by Zuluaga's campaign and alleged drug money in Santos's campaign back in 2010.

Ramirez ended her campaign among crowds in the city of Ubate, located in the central Cundinamarca department, where she sought support from Colombians in a bid to become the country's first woman president.

Candidates are now preparing for a series of public debates scheduled for the coming week after which Colombians will decide who will lead the Andean country until 2018.