Netcare 911 paramedics and other services responded to an accident on Turfontein Street in Rosettenville, Johannesburg after 02h40 this morning.
Upon their arrival on scene they found that one person was in a critical condition and three others in a serious condition after a vehicle overturned.
The injured patients were treated on scene before they were transported to hospital for further medical care.
Exact detail to the cause of the accident and preceding events will remain the subject of a police investigation.
