Ugandans are voting in an election that is widely expected to see President Yoweri Museveni win a fourth term.
The ruling party has been widely accused of paying people to support the president who has been in power for three decades.
It has sparked fears of violence in Africa’s third largest economy with the opposition threatening street protests if the poll is deemed to be rigged.
The front-running opposition candidate, Kizza Besigye, has lost twice before to his former ally Museveni, and has repeatedly warned of an Egyptian-style revolt if the election is unfair.
Many analysts, however, say a public uprising is not likely to succeed in Uganda, where a population less educated and less Internet-savvy than that of Egypt is afraid of an army with a history of violently suppressing dissent.
Ugandans vote after bitter presidential campaign