Professional racer andMythbustersstar Jessi Combs died on Tuesday at age 36.

The Harney County Sheriff’s Office confirmed to PEOPLE that they received a call around 4:00 p.m. on Tuesday reporting that a jet car attempting to break a land speed record crashed in the Alvord Desert in southeastern Oregon Deputies arrived on the scene and identified the driver and sole fatality in the vehicle as Combs, who was pronounced dead at the scene.

The cause of the crash is still unknown.

Terry Madden, a member of Combs’ team, confirmed her death in an Instagram post on Wednesday, sharing a montage video of he and Combs, who was known as“the fastest woman on four wheels.”

“She was the most amazing spirit that I have ever or will ever know,” he continued. “Unfortunately we lost her yesterday in a horrific accident.”

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Jessi Combs

Madden revealed that he was the “first one” on the scene where Combs died, and noted that they “did everything humanly possible to save her.”

“Please donate to nothing, I know there will be people try [sic], we are finishing the documentary as she wished and the world will know the truth and her foundation will use those funds to do amazing things in this world and make her legacy live on properly,” he wrote.

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Jessi Combs

“Love you all and thank you all for being such amazing friends to her,” he wrote. “She dedicated her life to helping support others dreams and I promise I will continue that.”

Combs claimed the women’s 4-wheel land speed record in 2013, with a top speed of 440.709 mph. In 2016, she set a new top speed record of 477.59 mph.

source: people.com