The race was won by Tony Stewart Daytona, Fla. – Several cars crashed and disintegrated Saturday in front of the grandstand at the end of a NASCAR Nationwide Series race at Daytona International Speedway.
It was unclear immediately if anyone in the stands was seriously injured, but the engine from Kyle Larson's car, which flew high and tore into the fence at the start-finish line, was seen burning inside an open area in the fence, and a large portion of the car appeared to go over the fence.
MORE: Driver taken to hospital after 11-car crash
A tire came over the fence, and a lot of debris came up into the stands, where safety crews were working on at least five people, including four who were strapped to backboards. And at least two people were injured in the upper deck, where another safety crew with an additional two stretchers were sent.
Safety crews and police have closed off the area, escorting fans out of the area. 
Kyle Larson, left, slides to a stop near Regan Smith (7) after a wreck at the conclusion of the NASCAR Nationwide Series auto race Saturday. (Photo: Chris O'Meara, AP) NASCAR president Mike Helton said the series and track were working furiously to figure out the damage.
"Right now all we know is everyone is working really hard to determine what all happened," Helton said during an ESPN interview.
Tony Stewart, who won the race by avoiding the crashing cars, appeared shaken after the race.
"We've always known since racing was started this was a dangerous sport, but we assume that risk, and it's hard when the fans get caught up in it," he said from Victory Lane. "So as much as we want to celebrate now and as much as this is a big deal to us, I'm more worried about the drivers and the fans in the stands right now, because I could see it all in the mirror, and it didn't look good from where I was at, either."
The Drive4COPD 300 had restarted with two laps remaining in the 120-lap race after it had been interrupted by a multicar pileup that resulted in driver Michael Annett being sent to a nearby hospital. As the field raced to the white flag signaling the final lap, Regan Smith's car was turned sideways.
"I threw a block there," Smith said. "I knew Brad (Keselowski) was going to try to make a move on me. ... If I'm in the same situation tomorrow (in the Daytona 500), I'll do the same thing again." 
Track officials bring in stretchers after fans were injured from debris from a crash on the final lap of the DRIVE4COPD 300 at Daytona International Speedway. (Photo: JD Mercer, USA TODAY Sports) As cars began to spin, Larson's car became airborne and ripped into the catch fence. When it came to a stop, its engine was missing.
"I took a couple of big hits there and saw my engine was gone," Larson said.
NASCAR officials said all drivers involved in the second massive wreck were treated and released.
After being treated and released, Dale Earnhardt Jr. said everyone "seems in good spirits" among the drivers who were in the care center, but Earnhardt expressed concern for those in the grandstands. "Guess some debris went up there," he said. "I'm worried about everybody up there."
PHOTOS: ACTION FROM DAYTONA 
The car of NASCAR Nationwide Series driver Kyle Larson catches fire after a crash during the DRIVE4COPD 300 at Daytona International Speedway.
Kevin Liles, USA TODAY Sports Related story Fullscreen ![None]()
Medical personnel assist fans sitting close to the wall following an incident at the finish of the NASCAR Nationwide Series DRIVE4COPD 300 at Daytona International Speedway on February 23, 2013 in Daytona Beach, Florida.
Jonathan Ferrey, Getty Images Related story Fullscreen ![None]()
Medical personnel remove an injured fan from the stands following an incident at the finish of the NASCAR Nationwide Series DRIVE4COPD 300 at Daytona International Speedway on February 23, 2013 in Daytona Beach, Florida.
Jonathan Ferrey, Getty Images Related story Fullscreen ![None]()
Medical personnel remove an injured fan from the stands following an incident at the finish of the NASCAR Nationwide Series DRIVE4COPD 300 at Daytona International Speedway on February 23, 2013 in Daytona Beach, Florida.
Jonathan Ferrey, Getty Images Related story Fullscreen ![None]()
Medical personnel assist fans sitting close to the wall following an incident at the finish of the NASCAR Nationwide Series DRIVE4COPD 300 at Daytona International Speedway on February 23, 2013 in Daytona Beach, Florida.
Matthew Stockman, Getty Images Related story Fullscreen ![None]()
Medical personnel remove an injured fan from the stands following an incident at the finish of the NASCAR Nationwide Series DRIVE4COPD 300 at Daytona International Speedway on February 23, 2013 in Daytona Beach, Florida.
Jonathan Ferrey, Getty Images Related story Fullscreen ![None]()
Track officials pull an engine out from the stands after a crash on the final lap of the DRIVE4COPD 300 at Daytona International Speedway.
JD Mercer, USA TODAY Sports Related story Fullscreen ![None]()
A fan is wheeled out on a stretcher after being injured from debris from a crash on the final lap of the DRIVE4COPD 300 at Daytona International Speedway.
JD Mercer, USA TODAY Sports Related story Fullscreen ![None]()
Track workers and officials survey the damage to the catch fence after a crash on the final lap of the DRIVE4COPD 300 at Daytona International Speedway.
JD Mercer, USA TODAY Sports Related story Fullscreen ![None]()
NASCAR Nationwide Series driver Kyle Larson (32) goes up into the fence after being involved in a crash on the final lap during the DRIVE4COPD 300 at Daytona International Speedway.
Sam Sharpe, USA TODAY Sports Related story Fullscreen ![None]()
NASCAR Nationwide Series driver Kyle Larson (32) goes up into the fence after being involved in a crash on the final lap during the DRIVE4COPD 300 at Daytona International Speedway.
Sam Sharpe, USA TODAY Sports Related story Fullscreen ![None]()
NASCAR Nationwide Series driver Kyle Larson (32) goes up into the fence after being involved in a crash on the final lap during the DRIVE4COPD 300 at Daytona International Speedway.
Sam Sharpe, USA TODAY Sports Related story Fullscreen ![None]()
NASCAR Nationwide Series drivers Dale Earnhardt Jr (88) , Parker Kligerman (77) , Kyle Larson (32) and Justin Allgaier (31) are involved in a crash during the DRIVE4COPD 300 at Daytona International Speedway.
Sam Sharpe, USA TODAY Sports Related story Fullscreen ![None]()
NASCAR Nationwide Series drivers including Kyle Larson (32) , Eric McClure (14) , Robert Richardson Jr (23) , and Brian Keselowski (22) are involved in a crash on the final lap during the DRIVE4COPD 300 at Daytona International Speedway.
Sam Sharpe, USA TODAY Sports Related story Fullscreen ![None]()
NASCAR Nationwide Series driver Kyle Larson (32) , Travis Pastrana (60) , Nelson Piquet Jr (30) and Brad Keselowski are involved in a final lap crash during the DRIVE4COPD 300 at Daytona International Speedway.
Sam Sharpe, USA TODAY Sports Related story Fullscreen ![None]()
NASCAR Nationwide Series drivers Nelson Piquet Jr (30) , Kyle Larson (32) and Brad Keselowski (22) are involved in a final lap crash during the DRIVE4COPD 300 at Daytona International Speedway.
Sam Sharpe, USA TODAY Sports Related story Fullscreen ![None]()
NASCAR Nationwide Series drivers Kyle Larson (32) and Brad Keselowski (22) are involved in a final lap crash during the DRIVE4COPD 300 at Daytona International Speedway.
Sam Sharpe, USA TODAY Sports Related story Fullscreen ![None]()
NASCAR Nationwide Series driver Brad Keselowski (22) and Kyle Larson (32) are involved in a final lap crash during the DRIVE4COPD 300 at Daytona International Speedway.
Sam Sharpe, USA TODAY Sports Related story Fullscreen ![None]()
A track official looks at a car engine that flew through the catch fence after a final lap crash during the DRIVE4COPD 300 at Daytona International Speedway.
Sam Sharpe, USA TODAY Sports Related story Fullscreen ![None]()
Damage to the wall is seen following an incident at the finish line of the NASCAR Nationwide Series DRIVE4COPD 300 at Daytona International Speedway on February 23, 2013 in Daytona Beach, Florida.
Jonathan Ferrey, Getty Images Related story Fullscreen ![None]()
Michael Annett (43), Johanna Long (70), Travis Pastrana (60), Hal Martin (44) and Kasey Kahne (5) collide between Turns 1 and 2.
Phelan M. Ebenhack, AP Related story Fullscreen ![None]()
Trevor Bayne, driver (6), Brian Vickers (20) and Kasey Kahne (5) race during the NASCAR Nationwide Series DRIVE4COPD 300 at Daytona International Speedway.
Todd Warshaw, Getty Images Related story Fullscreen ![None]()
Mike Wallace (01) spins coming out of turn 4 during the NASCAR Nationwide Series auto race at Daytona International Speedway in Daytona Beach, Fla., Saturday, Feb. 23, 2013.
Phelan M. Ebenhack, AP Related story Fullscreen ![None]()
Drivers race during the NASCAR Nationwide Series DRIVE4COPD 300 at Daytona International Speedway.
Jonathan Ferrey, Getty Images Related story Fullscreen ![None]()
Ricky Stenhouse Jr., left, greets Danica Patrick next to her car before the start of the NASCAR Nationwide Series auto race at Daytona International Speedway.
John Raoux, AP Related story Fullscreen Like this topic? You may also like these photo galleries:
