A 17-year-old boy remains in a critical condition after a crash near Wickliffe on Monday.
The boy and a 49-year-old man were flown to The Alfred hospital after they were ejected from their van which rolled on the Glenelg Highway.
A 12-year-old boy and a 15-year-old boy are now in a stable condition.
Both were flown to the Royal Children’s Hospital. All four are from Noble Park.
It is believed the Mercedes-Benz van was travelling west on the Glenelg Highway when it lost control, hitting a fence before rolling into a dam around 2pm.
Police are investigating the circumstances surrounding the crash.
They are appealing for any witnesses to contact Crime Stoppers on 1800 333 000 or visit www.crimestoppers.com.au