KAMPALA SECURITY ON DEF-CON 3 ALERT
One of Uganda's main opposition candidates has been briefly detained by police ahead of presidential elections on Thursday.
Kizza Besigye has been arrested on many occasions in past but this is the first time during this election campaign.
Mr Besigye has in the past lost three disputed elections against the long-time leader Yoweri Musevini.
Mr Museveni, 71, has been in power for 30 years and is running for a fifth term in office.
The BBC's Catherine Byaruhanga reports that he was released by police and they told her that he was being taken to his next rally.
Our correspondent says that shortly before he was detained Mr Besigye's car was driving along one of main highways in Uganda's capital, Kampala, and escorted by hundreds of supporters.
Witnesses say teargas was fired to disperse the crowd.
The police told our correspondent that he was not under arrest but was being held because he disobeyed orders not to disrupt city traffic.
Mr Besigye used to be President Museveni's personal doctor, but he went on to become his political opponent and has referred to him as a "dictator".http://www.bbc.com/news/world-africa-35577300
