South Africa's police watchdog is investigating the death of a man who was apparently filmed being handcuffed to the back of a police van and dragged along the ground.
The Daily Sun, a South African newspaper, published video footage, apparently filmed by a bystander on a mobile phone, in which uniformed officers subdue the man.
They tie him to the back of a police vehicle in front of a crowd.
South African media said the man was 27-year-old taxi driver Mido Macia, who was approached by police in Daveyton, Ekurhuleni, east of Johannesburg.
Moses Dlamini, of the Independent Police Investigative Directorate, said on eNCA, a South African news channel, that he was "shocked" by the police conduct and that a murder probe is under way.
The cause of death was not immediately clear.