Netcare 911 paramedics and other services responded to an accident on the R55 near Allandale in Kyalami this morning.
Upon their arrival on scene they found that a motor vehicle had left the road way and came to a standstill next a storm water drain about six metres below the roadway.
Two male occupants sustained serious injuries and fortunately a two-year-old boy was unharmed during the accident.
The two men were treated on scene before they were transported to a nearby Netcare facility for further medical care.
Exact detail to the cause of the accident and preceding events are unknown and will remain the subject of a police investigation.