Kyle Larson, the driver whose car hit the fence in the middle of the massive crash, walked away. Twenty-eight fans were injured.
NASCAR has already uploaded a video of the crash.
A multi-car crash during the final lap of the NASCAR Nationwide Drive4COPD race injured 28 bystanders, officials said Saturday.
A track worker told Yahoo! Sports that one woman had a tourniquet on her leg, while other fans suffered burns, and one person was hit by a flying tire.
The driver who won the race, Tony Stewart, managed to miss the pileup.
"Certainly when you look at this incident, there are some things we can learn and evaluate," said Steve O'Donnell, NASCAR's senior vice president of racing operations. "The safety of our fans is first and foremost."
Tweets and photos from the scene:
Image by Pierre Ducharme / Reuters