Nascar driver Tony Stewart struck and killed a driver who was walking on a dirt track during a race in upstate New York, authorities say.
A video of the crash at Canandaigua Motorsports Park showed driver Kevin Ward Jr. stepping toward Stewart's car before being hit and hurtled 50 feet.
The Ontario County Sheriff's Department would not identify the driver but said he was pronounced dead Saturday night at a hospital in Canandaigua.
Sheriff Philip Povero said his office is not investigating the incident as a criminal matter. He said Stewart, 42, was "'fully cooperative" while being questioned and released.
Calls to Stewart's representatives were not immediately returned. The three-time NASCAR champion is scheduled to race in NASCAR's event Sunday at Watkins Glen.