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Plymouth (Ind.) Speedway announced Tony Stewart won't be racing a sprint car at its track Saturday.

Stewart, whose sprint car struck and killed driver Kevin Ward Jr. under caution during last Saturday night's Empire Super Sprints race at Canandaigua (N.Y.) Motorsports Park, was scheduled to race the Bob Newton Classic at the venerable dirt track, which is about two hours north of his hometown of Columbus, Ind.

The 0.375-mile oval said via a statement on its website: "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. Tony Stewart will not be racing at Plymouth Speedway this Saturday. More information on the weekend's racing will be announced this week."

The three-time Sprint Cup champion didn't race Sunday at Watkins Glen International, where Regan Smith substituted in the No. 14 Chevrolet.

As Stewart weighs whether to return to the track in the Sprint Cup Series at Michigan International Speedway, Stewart-Haas Racing said there is no timetable on a decision.

"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," SHR director of communications Mike Arning said in an email to USA TODAY Sports.

Follow Ryan on Twitter @nateryan

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