According to Grayson County Sheriff's reports, an unidentified man was driving a 2003 Chevrolet Silverado owned by Randall Decker of Leitchfield.
The driver was traveling south on 736 and entered into a curve in the 4100 block, reports said, at a speed too fast for the curve.
Deputy Tony Willen stated the vehicle was traveling too fast and went into the ditch, then the driver apparently over-corrected and struck the ditch on the other side of the road and overturned.
Both the driver and passenger were flown to University Hospital after being thrown from the Silverado.
Willen reported Decker, the registered owner of the Chevy truck, told police that the vehicle was taken without his permission.
Neither the driver or the passenger had been identified as of press time Tuesday. The accident occurred shortly after 4 a.m. Tuesday (3/6).
Deputies estimated the light truck was traveling between 50 and 55 mph when the driver lost control. There was severe damage to the front of the truck.
The two men were flown from the scene of the accident, reports said, with injuries described as serious.