Cristina Biffle, the wife of NASCAR driver Greg Biffle, sent a final text message to her mother moments before a plane crash that killed the couple and their two children, according to details shared by family members following the deadly incident, as reported by The New York Post.

The crash occurred Thursday morning when a Cessna C500 jet attempted to land at Statesville Regional Airport in North Carolina shortly before 10:30 a.m. ET.

The aircraft went down on the runway and burst into flames, killing everyone on board.

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Cristina Biffle, Greg Biffle, their 14-year-old daughter Emma, and their 5-year-old son Ryder were among the victims. Also killed in the crash were Craig Wadsworth, Dennis Dutton, and Dutton’s son, Jack.

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In an interview with People, Cristina’s mother, Cathy Grossu, said her daughter sensed something was wrong during the flight. Grossu said she received a brief text message from Cristina just before the crash.

“She texted me from the plane, and she said, ‘We’re in trouble.’ And that was it,” Grossu told the outlet.

“So we’re devastated. We’re brokenhearted,” she added.

Video from the scene showed the aircraft engulfed in flames on the runway as emergency crews rushed to respond. Authorities have not yet released details on what caused the crash, and an investigation is ongoing.

Grossu said all of the passengers were traveling to Florida for a birthday trip. She described the loss of her daughter, son-in-law, and grandchildren as overwhelming.

“The entire situation is hard to bear,” Grossu said, adding that she could not “believe they’re gone.”

She told People that she could not recall the final words she exchanged with her daughter, Greg, or the children, but said, “they were happy.”

Greg Biffle, a semi-retired NASCAR driver, won 19 NASCAR Cup Series races during his career and was a one-time Busch Series champion.

In recent years, he had drawn attention for his humanitarian efforts, including flying relief supplies into Western North Carolina following Hurricane Helene.

NASCAR acknowledged Biffle’s contributions in a statement following his death.

“Beyond his racing career, he gave of himself for the betterment of our community,” NASCAR said.

“Most notably, Greg spent countless hours of his time helping the citizens of North Carolina during the disasters that followed Hurricane Helene.”

Grossu also shared a final conversation she had with Cristina shortly before the trip, centered on a charitable effort involving Santa letters for families in need.

“She said, ‘Mom, can you go pick up the last 17 letters that are at Staples? I want to get them in the mail before I get on the plane tomorrow,’” Grossu told People.

She said she picked up the letters and delivered them to the Biffle home, where Cristina completed them late that night.

“When they got home last night, she put them in envelopes and finished them all up to get them off to those last 17 families to bring joy to them,” Grossu said. “And that would be the last thing that she would’ve done.”

Federal aviation authorities are continuing to investigate the cause of the crash. No additional information has been released.