Ugandan police say the head of telecommunications company MTN Uganda – a unit of South Africa's MTN group – has been deported for national security reasons.
The company's chief executive, Wim Vanhelleputte, was put on a plane to his native Belgium on Wednesday evening.
There has been no official explanation.
Last month, three foreign nationals working for MTN Uganda were also deported.
One of them, Elsa Mussolini, said she had been accused of inciting violence and funding the Ugandan opposition politician, Bobi Wine.
The musician turned politician is a critic of President Yoweri Museveni.