Police in Norway revoked a special speed licence issued to Top Gear after one of its supercars was clocked doing 243km/h in a 80km/h tunnel.
Sensors alerted police to the vehicle as it zoomed through the three and-a-half mile Atlantic Ocean Tunnel while Top Gear were filming.
The BBC have insisted that Matt LeBlanc, 49, and Chris Harris, 42, were not in the area at the time the reading was recorded.
But officers are demanding to know who was behind the wheel of the speeding car.
'We are fully co-operating with the police', a BBC spokesman told The Sun.
The special permit issued by police in Norway allowed the cars to travel at speeds of up to 87mph (140km/h).
The tunnel was closed off for filming so the BBC2 show could take a Ferrari GTC4 Lusso and a Porsche Panamera Sport.
But they scrapped it after one of the vehicles exceeded that limit by more than three times.
Filming carried on yesterday but both supercars were limited to travelling at no more than 50mph (80km/h).
Police chief Anne Berit Lian said: 'At present, one cannot determine who was behind the speed violations. The investigation is aimed at uncovering this.
'Permits to exceed the speed limit have been revoked.'
It comes after the show's failed attempt to lift a 80km/h speed limit for filming at Romsdal, Norway, in 2016 when Chris Evans was host.
The $438,000 shoot was cancelled because police refused to up the speed limit - even after cars were shipped over, roads closed and helicopters organised.
-Daily Mail