Witnesses say NASCAR star Tony Stewart struck another driver at a New York dirt track Saturday, a year after he was involved in another crash that left a young woman dead.

Authorities say they are investigating the crash at Canandaigua Motorsports Park but gave no details early Sunday. A spokeswoman for Thompson Health said the hospital was treating one patient involved in the crash at Canandaigua Motorsports Park, but would not identify the patient or give a condition or injury details.

Michael Messerly, a fan who witnessed the crash, said it appeared Stewart -- racing there on the eve of a race at Watkins Glen -- hit a driver who was walking on the dimly lit track after they had collided on the previous lap.

***UPDATE***

Per Sheriff Povero, Kevin Ward, age 20 years old, has died from his injuries sustained from the incident with Tony Stewart.

 

This is a very graphic video.  Click here to watch the incident. ***WARNING***This is a very graphic video.