Venezuelan President Nicolas Maduro won an overwhelming majority in Sunday's elections, the National Electoral Council (CNE) said.
Maduro took 68 per cent of the vote, while his challenger Henri Falcon gained just 21 per cent.
"Peace and democracy have won," Maduro said.
Before the results were announced, Falcon said he would not recognize the results of a poll fraught with irregularities.
"We do not recognize this electoral process and regard it as illegitimate," the opposition candidate said at a press conference, calling for fresh elections.
"I hope that beyond the initial confusion that any candidate will feel... they will recognize the results sooner or later," Maduro said.
Maduro first took office in 2013 after his predecessor Hugo Chavez died, and is set to govern Venezuela for another six-year term, from January 2019 to 2025.
