Police are appealing for information and witnesses following a serious injury road traffic collision involving and elderly couple and young man from Denmead and a young woman from Portsmouth.
Police were called at about 8.30pm on Tuesday 27 December to the scene of a road traffic collision at the junction of the B2177, Fareham Road and South Boarhunt Road.
It involved a silver Audi RS3 travelling westbound on the B2177 and a red Ford Fiesta travelling north on South Boarhunt Road.
The two occupants of the Audi, a 22-year-old man from Denmead and a 23-year-old woman from Portsmouth, suffered minor injuries.
The two occupants of the Fiesta, an 80-year-old man and 54-year-old woman, both from Denmead, suffered serious injuries and were taken to hospital where they remain.
Police Constable Philip Robertson, of the Roads Policing Unit, said: "At least three other vehicles stopped at the scene but left without leaving any details.
"We would like to speak to these people and anyone else who witnessed the incident or saw the cars involved before the collision."
If you have any relevant information or dash cam footage, please call 101, quoting incident number 44220518788.
Alternatively, you can also submit information to us online here: https://www.hampshire.police.uk/tua/tell-us-about/cor/tell-us-about-existing-case-report/