Uganda's opposition frontrunner Bobi Wine votes

The 38-year-old reggae artist is channeling the anger of many young Ugandans who say former guerrilla leader and incumbent president Yoweri Museveni, now 76, is an out-of-touch dictator failing to tackle unemployment and surging public debt.

Museveni calls Wine an upstart backed by foreign governments and homosexuals and says his administration guarantees stability and progress including much-needed hydropower dams and roads.

Voting began between 60 to 90 minutes late at six polling stations visited by Reuters after ballot papers did not arrive on time.

Lines of voters were growing at many stations as midday approached and soldiers and police in riot gear patrolled the capital.