Uganda's opposition presidential candidate on Sunday rejected preliminary poll results showing a landslide win for incumbent President Yoweri Museveni.
Election officials say Museveni had 68 percent of the vote compared to 26 percent for his arch rival, Kizza Besigye. The results are based on 92 percent of the polling stations across the country.
Besigye called the vote a sham, and said he also rejects the leadership of Museveni.
Besigye is Mr. Museveni's former physician and has challenged him three times for the presidency.
Museveni, who seized power in early 1986, is bidding to win a fourth term that would extend his rule in Uganda to 30 years.
Besigye plans to release his own vote tally and has threatened to call for street protests if his results do not match the election commission's numbers. He has warned that Uganda is ready for an Egyptian-style revolt.
Before Friday's election, Besigye accused the government of trying to rig the vote. President Museveni denied the charge.
Ugandans also voted Friday to elect members of parliament.
About 14 million Ugandans were registered to vote in the presidential and parliamentary elections. These were the fourth elections in Uganda since the return of multi-party polls in 1996.