Thames Valley Police is appealing for witnesses following a serious injury collision in Stokenchurch.
At around 5.20pm on Monday (19/6) a collision occurred between a silver Mercedes Benz E Class, a white BMW X3 and a white Peugeot Partner Expert, at junction 5 of the M40, Stokenchurch.
The driver of the BMW dislocated her shoulder, a 57-year-old passenger fractured her chest bone and suffered torn neck ligaments and a 75-year old passenger sustained minor injuries.
They remain at hospital at this time.
No arrests have been made.
Investigating officer PC Christopher Miller, of Roads Policing Unit based at Amersham police station, said: “We are appealing for any witnesses to this collision to please come forward.
“We’d also ask any motorists who were in the area at this time to check dash-cam footage in case it has captured something that could assist our investigation.
“Anyone with information can contact the police by calling 101 or making a report online, quoting reference 43230270056.”