Police say four young people killed in a single-car crash in Victoria's west were likely teenagers from the area, as an investigation into the "horrific" crash continues.
Sergeant Ryan Nelson said police believed the driver of a sedan carrying five people lost control of the car as she drove along Wannon-Nigretta Road near Hamilton and hit a tree.
Emergency crews were called to the crash around 9:30am Saturday, but were unable to save the lives of four people who died at the scene.
Those who died include two females and two males.
A teenage girl was flown to the Alfred Hospital in Melbourne suffering upper body injuries and remains in a critical condition.
"The scene is still pretty horrific at the moment," Sergeant Nelson said on Saturday night.
"Hamilton's a very close-knit community and there's five people involved in this and all their families and all their friends.
"It's going to hit the town really hard."
Major Collision Investigation Unit detectives cordoned off the scene on Saturday and began what Sergeant Nelson said would be a full investigation to bring answers to grieving families.
The crash occurred on a relatively quiet, rural road which runs past Hamilton Airport and the tourist attraction Nigretta Falls.
"It is a quiet road, but it is a 100-kilometre zone and we're still making inquiries into how this happened," Sergeant Nelson said.
There have been 124 lives lost on Victoria's roads this year, according to the state's provisional tally, compared to 96 lives at the same time last year.
