The Washington Post's Cindy Boren describes the fatal accident Saturday night at a dirt-track race in Canandaigua, N.Y., where Tony Stewart's car struck and killed fellow driver Kevin Ward Jr. The popular NASCAR driver, who was a regular on the dirt-track circuit, now faces an uncertain racing future. (Jhaan Elker and Kate M. Tobey/The Washington Post)

After he struck and killed a fellow driver during a dirt-track race Saturday night, Tony Stewart has an uncertain racing future.

He pulled out of a dirt-track race this weekend in Indiana, but there has been no indication whether he will drive in the Pure Michigan 400 that follows on Sunday.

“The decision to compete in this weekend’s NASCAR Sprint Cup Series event at Michigan will be Tony’s, and he will have as much time as he needs to make that decision,” Mike Arning, the director of Stewart-Haas Racing, told USA Today. “It is still an emotional time for all involved, Tony included. He is grieving, and grief doesn’t have a timetable.”

Plymouth Speedway announced that Stewart had made the decision not to race Saturday night and he pulled out of the Watkins Glen event the day after Kevin Ward Jr. was killed Saturday night in Canandaigua, N.Y.

“We at Plymouth Speedway extend our deepest condolences and prayers to the family of Kevin Ward Jr. and thoughts and prayers to Tony Stewart and his family,” the track’s statement said. “Tony Stewart will not be racing at Plymouth Speedway this Saturday. More information on the weekend’s racing will be announced this week.”

After his car was wrecked by Stewart on Saturday night, Ward climbed out of his car and was walking angrily on the track when Stewart struck him, dragging him about 50 feet. Ward was pronounced dead shortly afterward and an investigation into the incident is continuing.