A major crash has caused long delays on the A303 as multiple emergency services, including an air ambulance, responded.

The crash was first reported at 9.28am on Friday, December 1 near the Thruxton Aerodrome and Thruxton Circuit. Eyewitnesses reported seeing a Mini Cooper on its roof.

The A303 and slip road to Tidworth and Cholderton remain closed. Google Maps is reporting that the road will be closed until at least midday. 

Although the crash occurred within the jurisdiction of Hampshire Police, Wiltshire Police released a statement via Facebook at 9.39am.

SEE ALSO: Live updates on A303 crash near Thruxton

Wiltshire Police said: "Please be aware that the A303 near Thruxton Aerodrome is currently closed in both directions following a serious RTC.

“The road is likely to be closed for the foreseeable future.

“Please avoid the area."

The South Western Ambulance Service NHS Foundation Trust (SWASFT)also issued a statement on the incident.

SWASFT said: “We were called at 9.28am on Friday, December 1 to a road traffic incident on the A303 near Thruxton Down. We sent two double-crewed land ambulances, an air ambulance and a responding officer.”