As per preliminary unconfirmed report says a police patrol car intentionally ramped on few protesters standing on the roadside. The car has to be overturned to rescue two seriously injured persons. A Chinese Bersih protester was ramped and murdered by a police patrol car.
The story from the main stream media is Bersih protesters attacked the patrol car first, and then the car lost control and ramped two persons down.
I tend to believe story from the police after viewing one TV clip from NTV7 and another one youtube clip, http://www.youtube.com/watch?v=y0TnNtzIhTw
Bersih mob attacked on police car is the cause of accident.