Kyle Larson, driver of the #32 Clorox Chevrolet, Justin Allgaier, driver of the #31 Brandt Chevrolet, Brian Scott, driver of the #2 Shore Lodge Chevrolet, and Brad Keselowski, driver of the #22 Discount Tire Dodge, are involved in an incident at the finish of the NASCAR Nationwide Series DRIVE4COPD 300 at Daytona International Speedway on February 23, 2013 in Daytona Beach, Florida. (Photo by Chris Graythen/Getty Images)


Daytona Beach, FL (Sports Network) - Tony Stewart has won the NASCAR Nationwide Series season-opener at Daytona International Speedway after a horrific crash occurred on the frontstretch when Stewart was taking the checkered flag.

The multi-car accident occurred in the tri-oval when then-leader Regan Smith was hit from behind by Brad Keselowski, the 2012 Sprint Cup Series champion. Smith's car spun into the outside wall and then turned around, collecting several drivers who were running behind him in a tight pack. Rookie Kyle Larson flipped around and then sailed into the catchfence before coming back down on the track.

According to the Daytona Beach Police Department, at least 15 race fans in the grandstand were injured. Eleven of them were transported to nearby Halifax Medical Center in Daytona Beach. One fan was reportedly listed in critical condition. Track safety personnel had immediately responded to the incident.

"There was obviously some intrusion into the fence, and fortunately with the way the events are equipped, there was plenty of emergency workers ready to go," NASCAR president Mike Helton said during an interview on ESPN's post-race coverage. "They all jumped on it pretty quickly.

"Right now, it's just a function of trying to determine what all damage is done. They're moving folks to care centers and taking some folks over to Halifax Medical Center."

None of the 12 drivers involved in the crash were injured.

Incredible Video Shows Daytona Crash As Seen From The Stands:

Larson's car tore a gaping hole in the catchfence, with the engine and one of the tires sheared off his No. 32 Chevrolet and lodged in the fencing. Larson managed to climb out of the car on his own.

"We don't know everything we need to know," Helton said in regards to safety for the drivers and spectators at the racetrack. "There are moments that occur that we've just never seen before and plan for them. Although, everybody's effort is to make it as safe as possible for both the competitors and the fans."

Another big crash, involving 13 drivers, took place between turns one and two with five laps to go, forcing NASCAR to halt the race for 20 minutes due to track cleanup efforts. Michael Annett tagged Austin Dillon and spun him around, triggered the incident. Annett was transported to the hospital for further observation. He also managed to exit his car with no assistance.

The caution for that accident setup a two-lap shootout to the finish.

Smith, who had won the 2012 Nationwide season-finale at Homestead-Miami Speedway in his first start for JR Motorsports, held the lead for the final restart. After Smith was turned around, Stewart dove to the bottom of the track to avoid the incident. He crossed the finish line ahead of Sam Hornish Jr., who had pushed Stewart to the front during the last two laps.

"We've always known since racing started this is a dangerous sport," Stewart said during a non-celebratory affair in Daytona's Victory Lane.

Stewart has now won the Nationwide season-opener at Daytona a record-tying seven times, including five victories in the past six races. Dale Earnhardt also won this event seven times.

Rookie Alex Bowman finished third, followed by Dale Earnhardt Jr. and Parker Kligerman.

Brian Scott, Justin Allgaier, Eric McClure, Robert Richardson Jr. and Travis Pastrana completed the top-10.

Danica Patrick suffered engine failure in the early going and ended up finishing 36th. Patrick, who graduated from Nationwide to Sprint Cup full-time this season, landed a ride in a Turner Scott Motorsports entry for this event.

"It's unfortunate," said Patrick, who had led five laps. "We were having an awesome day, and it was really fun out there. It's fun to do these speedway races. My motivation was to go out there and win today."

Patrick will start on the pole for Sunday's Daytona 500. Last Sunday, she became the first woman to win a pole position for a race in NASCAR's premier series.