Thames Valley Police is appealing for witnesses to a road traffic collision in Aylesbury on Saturday night (27/5).
A black BMW 320 and a pedestrian were involved in the collision on New Street shortly before 9pm.
The pedestrian, a man in his fifties, sustained serious injuries and was taken to hospital, where he remains in a critical condition.
A 26-year-old man from Aylesbury was arrested on suspicion of driving whilst over the specified limit of a controlled drug and causing serious injury by careless driving. He remains in police custody.
Senior investigating officer Sergeant Ed Crofts, of the Serious Collision Investigation Unit, said: “This was a serious collision, which has left a man critically injured and fighting for his life. Our thought are foremost with him and his family.
“The road was busy with both vehicles and pedestrians at the time, many of whom would have witnessed the collision.
“I would appeal to these people and anybody who witnessed this collision or may have dash-cam or CCTV footage to contact us.
“Several off-duty nurses also stopped at the scene to give aid to the injured man, and I would urge them to also contact us.
“If you do have any information that could help us, please get in contact with us by calling 101 or reporting via our website, quoting reference number 43230233689.”

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