CARACAS – Candidates in Venezuela’s presidential election, scheduled for this Sunday, held their final rallies on Thursday.

Results of the vote could be published on Sunday evening or in the following days. Polls will be open between 6 am to 6 pm local time on Sunday.

President Nicolas Maduro, who has been in power since 2013 and is seeking his third six-year term, has said the country has the world's most transparent electoral system.

Domestic and international businesses "know that only with us are their investments guaranteed," Maduro said during a state television broadcast on Thursday.

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"I don't owe anyone anything, I am a totally independent president of the people, free and sovereign," Maduro, 61, told his final rally in central Caracas, adding he will call a national dialogue on Monday.

"I don't have favors, nor businesses, so I am a free man."

Venezuela opposition candidate Edmundo Gonzalez, who with opposition leader Maria Corina Machado has urged voters to go to polling stations early, said Venezuelans would be witness to change on Sunday.

The country’s Defense Minister General Vladimir Padrino has said the armed forces will respect the outcome of the election.

Attorney General Tarek Saab denied participating in political persecution or holding political prisoners and said in an interview with Reuters this week the election should be peaceful.

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"It's good for us if he (Maduro) wins," said public servant Luisa Medina, 51, who was wearing a Maduro T-shirt.

Hundreds of buses lined Caracas' central Libertador Avenue after transporting Maduro supporters, sometimes from other states.

"It's the only government which has thought about us, the poor," Medina said before Maduro's closing rally, adding the president had continued Chavez's project.