Sharif was returning to his palatial house at Raiwind after meeting editors of national newspapers at Al-hamra Arts Gallery on the Mall Road when two vehicles in his motorcade were involved in the accident.
Witnesses and police officials said the driver of a vehicle lost control after its tyre burst and it rammed into a tree. Another vehicle in the convoy then hit the other car on Canal Road.
The injured policemen from the Elite Force were taken to Jinnah Hospital, where doctors said they were out of danger.