A woman has died while another two have been airlifted to hospital following a two-crash in Pearcedale on Saturday evening, 27 June.
Police believe a blue Ford station wagon was travelling west along Baxter-Tooradin Road when it collided head-on with a grey Nissan Pathfinder about 5.30pm.
The incident left a man and woman trapped inside the station wagon.
Firefighters had to use jaws of life equipment to cut the pair free after passers-by initially came to their aid.
Police and Ambulance Victoria say the driver of the station wagon, an 81-year-old Frankston man was airlifted to The Alfred hospital in a serious but stable condition with upper and lower body injuries.
His female passenger, who is yet to be formally identified, died at the scene.
The driver of the Pathfinder, a 39-year-old Rye man was also airlifted to The Alfred hospital in a stable condition with upper and lower body injuries.
A Victoria Police spokesperson said Major Collision Investigation Unit detectives were investigating and believe the blue Ford station wagon was driving at speed and seen veering onto the wrong side of the road prior to the collision.
About fifteen firefighters from Langwarrin, Devon Meadows and Pearcedale CFA brigades responded to the incident and remained on scene until about 6.45am.
Pearcedale CFA lieutenant Chris Judd said crews worked quickly, using the jaws of life to cut the man and woman out of the station wagon.
Mr Judd said six firefighters assisted in the hour and half rescue where they were forced to cut the door and roof of the car to free the woman.
The 81-year-old man had his foot stuck underneath the pedal before he was pulled free from the car, he said.
Mr Judd praised emergency services and passers-by who “put in a big effort considering the circumstances”.
“It was a messy scene, just debris all over the road,” he said.
Detectives are keen to speak to any witnesses or anyone that may have been in the area at the time who may have dash-cam footage.
Anyone with information is urged to call Crime Stoppers on 1800 333 000.