NASCAR driver Jason Leffler killed in crash

(CNN) -- NASCAR driver Jason Leffler died Wednesday after he crashed his car at the Bridgeport Speedway in New Jersey. He was 37.

Leffler was taking part in "Night of Wings," a 25-lap event for sprint cars with a $7,000 prize money. The race was not a NASCAR-sponsored event.

Sprint cars are high-powered cars that usually run on dirt or paved oval tracks.

"NASCAR extends its thoughts, prayers and deepest sympathies to the family of Jason Leffler who passed away earlier this evening," NASCAR said in a statement. "For more than a decade, Jason was a fierce competitor in our sport and he will be missed."

In March, another crash involving a sprint car killed two people at a racetrack in California.

That crash took place during warmup laps at Marysville Raceway Park, outside Sacramento. The car lost control, slammed into the pits, killing a 68-year-old man and a 14-year-old boy.

Soon after Leffler's death was announced, condolences poured in from fellow drivers.

"Deeply saddened by the passing of @JasonLeffler tonight. Please keep his family in your thoughts and prayers," tweeted Kyle Bush.

Another driver, Bobby Labonte, said in a Twitter post, "Lost a good guy tonight in Jason Leffler. Prayers with your family!"

"My thoughts and prayers are with Jason's family and friends," Jeff Burton posted. "Breaks my heart thinking of his little boy