President Zuma of South Africa shocked over 'police dragging'

South African President Jacob Zuma has condemned an incident captured on video in which a Mozambican taxi driver was handcuffed to the back of a police van and dragged through the streets.

He is reported to have died in custody later. President Zuma called the incident "horrific" and "unacceptable".

"No human being should be treated in that manner," Mr Zuma added. He said police must operate within the law.

Human rights groups have often accused South African police of brutality.

South Africa's police watchdog is investigating the footage taken by a bystander of the incident near Johannesburg. It has been widely shown in the media.

Reports say police initially assaulted the 27-year-old driver, accusing him of parking his vehicle incorrectly in Daveyton, east of Johannesburg.

The video shows a large crowd gathering, as uniformed policemen tie him to a van, dragging him as they drive away.

He was later taken into custody, where he died, local media has reported.