Officers are appealing for information following a fatal collision in Winchester on Sunday, December 26.
At 8.50pm, a family from Fair Oak, Eastleigh were travelling in a red Nissan Qashqai on the southbound M3.
The vehicle was on the slip road at junction 11 when it was in collision with the barrier.
A boy, aged eleven, was taken to Southampton General Hospital following the crash, where he later died.
Cops also say that the driver, a 61-year-old man, suffered serious, potentially life-changing, injuries.
A 48-year-old woman and a 9-year-old girl suffered minor injuries.
All of the individuals were taken to Southampton General Hospital.
The family are currently being supported by specialist officers, the police said.
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