A crash that left two people with serious injuries may have happened shortly after one of the vehicles was involved in an "altercation" with another driver, police have said. 

A blue Vauxhall Corsa and a white Volve V40 crashed into each other on the A404 Amersham Road near Holmer Green just before 3.30pm on Friday. 

The driver of the white Volvo, a woman in her forties, and the driver of the Corsa, a man in his fifties, are both in hospital with serious injuries. 

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Police investigating the cause of the crash, which happened close to the junction with Sheepcote Dell Lane, say the driver of the Corsa may have been involved in "some sort of altercation" with a driver in a silver Ford Focus. 

The driver of the Focus may have been attempting to "catch-up" with the Corsa driver before the crash happened. 

No one has been arrested at the moment and all parties have been identified. 

Investigating officer, PC Richard Lunn of the Joint Operations Roads Policing Unit, based at Amersham, said: “We are investigating this incident in which two people have been injured.

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“We are appealing to anyone who witnessed this collision or may have dash-cam footage of the collision to please come forward.

“Additionally we are keen to speak to, or receive dash-cam footage from, that will help us with further information as to the circumstances that led to this collision.

“We believe that there has been some sort of altercation between the drivers of the Vauxhall Corsa and the Silver Ford Focus.

"If you saw these vehicle before 3.20pm in the Holmer Green area or have dash-cam footage we would ask you to please get in touch.”

Anyone with information can call 101 or report online quoting reference 43200339597 or if you wish to report anonymously you can call Crimestoppers on 0800 555 111.