Dan Wheldon, the defending 2011 Indianapolis 500 winner, died Sunday at Las Vegas Motor Speedway, in a horrific 15-car wreck during lap 13 at the IndyCar Series finale.

Weldon, 33, had to be extricated from his vehicle and was airlifted to University Medical Center after his car flew over another vehicle and landed in a catch fence just outside Turn Two.

Drivers described the fiery crash as the worse they've ever seen. Several cars burst into flames, and debris was spread all over the track,

Officials decided to call the race, and drivers did a five-lap tribute.

The Emberton, England-native had won 16 races in nine-year career, including the Indy 500 in 2005, and was considered among the most popular drivers in the sport.

Randy Bernard, the chief executive officer for IndyCar, officially announced Wheldon's death two hours later.

IndyCar is very sad to announce that Dan Wheldon has passed away from unsurvivable injuries, Bernard said. Our thoughts and prayers are with his family today. IndyCar, its drivers and owners, have decided to end the race. In honor of Dan Wheldon, the drivers have decided to do a five-lap salute to in his honor.

Many competitors and fans were left in tears after the announcement.

Wheldon's death marks the first fatality in IndyCar since Paul Dana was killed at Homestead in 2006.

This is the video from the accident: