A 14-year-old boy has died and two teenagers are fighting for their lives after a car slammed into a tree in Victoria’s north-west.

Police said the vehicle was travelling down Calder Highway when it left the road and struck a tree near Woosang-Yeungroon Road, in Woosang, just before 10am on Saturday.

A 14-year-old boy, from the Mildura area, was declared dead at the scene.

The teenager was known to police and had previously been bailed for other offences, the Herald Sun reports.

Friends paid tribute to the boy on social media, with one saying he was grieving the death of his ‘big cousin’.

‘Fly in heaven … just sad I seen (sic) it all last night,’ he wrote.

Another said: ‘Forever gonna miss u mah bruva (sic) can’t believe ya gone, only 14.’

Police said the 18-year-old driver, who was also reportedly known to police, and his 14-year-old passenger – both from the Mildura area – had to be cut from the vehicle.

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Police said a car was travelling down Calder Highway when it left the road and struck a tree  in Woosang just before 10am on Saturday

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A 14-year-old boy has died and two teenagers are fighting for their lives

The teenagers were airlifted to hospital with life-threatening injuries.

Investigators said they believe the vehicle was stolen from a Mildura address overnight.

Police said on Saturday that the Calder Highway was expected to be closed for a significant amount of time while detectives attended the scene and investigated the circumstances surrounding the crash.

Anyone who witnessed the incident or has footage or information is urged to contact Crime Stoppers on 1800 333 000.