A man is critically ill in hospital following a motorbike accident at Knockhill Racing Circuit.
Police have not released details, but it is understood he is 48 years old and may be from the Angus area.
Police said the accident happened on the circuit on Tuesday and did not involve any other vehicle.
Knockhill has defended its safety record following the incident, the second serious motorcycle accident on the track in as many days.
On Monday, motorcyclist Matt Polanski, 30, of Cardenden, succumbed to injuries sustained during a Knockhill Motor Sports Club Pre-Injection 600 race the day before.
Knockhill managing director Jillian Shedden said: “On both occasions, the full and required level of medical services were in immediate attendance and administered emergency treatment at the scene, with the first rider being transferred by road ambulance, the second transferred by air ambulance.
“It is only the second time in 25 years that a patient has been transferred by air.
“The incident on Tuesday happened at a different corner and no other rider was involved.
“Investigations are ongoing, and as weather conditions were perfect on both occasions, and there were no apparent mechanical issues with either bike, and the track was in full licenced condition the management at Knockhill do not foresee any changes to procedures as a result of these two unfortunate accidents.
“Safety is always our priority.
“Our thoughts are with the friends and families of both riders involved.”