KAMPALA, Uganda - An aide to Uganda's main opposition presidential candidate says his office has been surrounded by heavily armed police, as voting and vote-counting continued.

Ingrid Turinawe said Friday that Kizza Besigye, the main rival to President Yoweri Museveni, was holding a meeting with other leaders of his party when police tried to force themselves into the premises.

She said Besigye's supporters resisted the police, who took positions outside the headquarters of the Forum for Democratic Change party.

She said Besigye's party is running its own tally centre and has discovered that some or the results being announced by the election commission are a "concoction."

She said the commission is announcing results according to tallies from polling stations, not according to districts as had been expected.