A man was killed in a crash between a Bugatti and an ambulance responding to a 999 call.
The smash happened at around 6.30pm when the sports car met an ambulance with its blue lights flashing on the northbound carriageway of the A6 in Bedfordshire.
Officers were called to the scene between between Barton and Clophill.
The collision resulted in a man in his 50s being pronounced dead at the scene by emergency workers, but it is not clear in which vehicle he was travelling.
Bedfordshire Police say he has not yet been formally identified.
His next of kin have been told of his death and are being supported by family liaison officers.
Sergeant Tim Davies of Cambridgeshire and Hertfordshire road policing asked for any witnesses to contact them
He said: "Our thoughts are with the family and friends of the victim at this time.
“I would urge anyone to contact us as soon as possible if you witnessed the collision or were driving along the A6 at that time and saw the incident, especially if you have a dash cam fitted to your vehicle.”
Police have not said which model of Bugatti was involved in the smash.
But prices of a Bugatti Chiron, which can reach speeds of more than 260mph, cost more than £2.5million.
The car firm was founded in 1909 by Ettore Bugatti was born in Milan, Italy in 1909, it can now be found in in the Alsace region,
In February The Mirror told how a mega rich car lover is facing a police investigation after driving at 260mph on motorway having posted the high-speed footage on YouTube.
Tycoon Radim Passer, 58, powered his Bugatti Chiron between Berlin and Hannover in July 2021.
He was accused of holding an illegal motor race after uploading a clip on the video-sharing website boasting about his early-morning stunt.
The Czech millionaire, who was lured by the lack of speed limits on German motorways, has got into trouble with police for his early-morning drive.
The prosecutor’s office in Stendal said it had launched an investigation after being made aware of the YouTube video.
Under German law, driving at such speeds is punishable even if roads have no set limits.
Authorities can act provided the driver was travelling “at an inappropriate speed and in a grossly irregular and reckless manner in order to achieve the highest possible speed.”