The US embassy in Uganda has warned that Westerners – including Americans – may be targeted for terrorist attacks in the capital Kampala.
It said it had “received information of possible threats” at city locations where Western nationals gather.
An attack “may take place soon” it said, adding that some planned events had been cancelled at Kampala hotels.
The embassy gave no further details. Uganda has been attacked in the past by Somalia’s al-Shabab militants.
In 2010, a double suicide bombing in Kampala’s club and restaurant district killed 76 people as they watched the football World Cup final.
Uganda is a key contributor to the African Union’s troops fighting al-Shabab inside Somalia.
Last September, Uganda was stripped of the right to host an international cricket tournament because of security concerns.