Ugandan President Yoweri Museveni has thanked voters for re-electing him and urged the opposition to accept the outcome of Thursday's election.
In his first address to the nation since his victory, he thanked Ugandans for rejecting "negative forces".
His defeated rival, Dr Kizza Besigye, has disputed the result and plans to challenge it in court.
Mr Museveni said opposition supporters threatened "to cause havoc" but security forces were ready for trouble.
He also accused them of "hobnobbing with terrorism".
Dr Besigye - who was once Mr Museveni's doctor - is currently out on bail having been accused by the state of several crimes, including attempting to overthrow the government through rebellion. He denies all the charges.
"Don't add to your mistakes," Mr Museveni said.
"Accept the constitutional process, continue organising your party - because you are now allowed - and then submit yourself again in five years time".
"Don't try to waste our time, because you will not go far."
'Illegal' vote
He also referred to the protesters who gathered outside the offices of Mr Besigye's Forum for Democratic Change party on Saturday to demonstrate against the result. They were dispersed by riot police using tear gas.
"They tried (to cause chaos). They couldn't. It's too late for that type of game," he said.
Mr Museveni - who has been in power for 20 years - won 59% of the vote, the Electoral Commission said on Saturday.
Dr Besigye - who took 37% - alleged massive fraud in the vote count, calling it "illegal".
"There is a big variation in the results coming out of our tallying centre from what the Electoral Commission is announcing," he said.
Changed constitution
Uganda's first multi-party vote in 25 years was seen as a test of its democratic credentials.
The outcome has been broadly endorsed by international monitors, although EU observers noted some problems with the campaign.
In their preliminary report, the observers said there was no "level playing field", pointing to Dr Besigye's arrest last year.
They also said state-media was biased towards Mr Museveni and his National Resistance Movement.
Chief EU observer Max van den Berg recommended Uganda should reinstate a law limiting a president to two terms.
Mr Museveni changed the constitution to allow him to contest these polls.
(BBC)
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