Police in New York State are investigating an accident at a dirt track involving Sprint Cup series driver Tony Stewart.  

According to Ontario County Sheriff Phil Povero, Stewart hit a driver who was walking on the track. That that driver was pronounced dead when he arrived at the hospital, but the sheriff has not yet released the driver’s name.

The sheriff said in a release that this is an ongoing investigation and that the district attorney has been notified, but no charges have been filed at this time. He also says Stewart is cooperating with the investigation.

Stewart is believed to be back in Watkins Glen and reports say he plans to race in Sunday’s Sprint Cup series race.

A spokesman for Stewart sent the following statement to the media: "A tragic accident took place last night during a sprint car race in which Tony Stewart was participating. Tony was unhurt, but a fellow competitor lost his life. Our thoughts and prayers go out to his family and friends. We’re still attempting to sort through all the details and we appreciate your understanding during this difficult time."

Witness at the track told the Sporting News that Kevin Ward, Jr. walked up to Stewart’s car after an on track incident, and that Stewart hit him with the rear wheels of his Sprint Car.

The track released the following statement Saturday night: ""Canandaigua Motorspots Park will not have an official statement on the accident that happened in the ESS race until tomorrow. Please pray for the entire racing community of fans, drivers, and families. Please be respectful in any comments."