The motorsport world remains in shock following the sudden death of NASCAR star Kyle Busch.
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Busch, 41, died on Thursday just hours after officials confirmed he had been hospitalized with a "severe illness."
While authorities initially withheld a cause of death, Busch's family has now revealed further details surrounding the tragic loss.
Kyle Busch's Cause of Death Revealed by Family
On Saturday morning, Busch's family released a statement following a medical evaluation into the NASCAR driver's death.
"The medical evaluation provided to the Busch family concluded that severe pneumonia progressed into sepsis, resulting in rapid and overwhelming associated complications," the statement read, via FanBuzz.
The family concluded the statement by requesting "continued understanding and privacy during this difficult time."
The update comes after reports that Busch had been battling what was initially described as a "sinus cold" in the days leading up to his death.
During the closing stages of the race at Watkins Glen International on May 10, Busch asked his team over the radio to arrange medical assistance following the event.
911 Call Revealed Alarming Details Before Busch's Death
Before last Sunday's All-Star Race, Busch openly admitted that he still was not feeling healthy.
He said that it was "still not great," while revealing he had been dealing with a "pretty substantial" cough.
On Friday, TMZ released audio from the 911 call connected to the NASCAR star's death.
According to the report, the caller told dispatchers on Wednesday evening that Busch had been "struggling to breathe, overheating and coughing up blood before medics rushed to help."
The caller reportedly explained that Busch remained conscious but was lying on the bathroom floor inside a training facility.
An ambulance was requested, with instructions for sirens to remain off upon arrival.
Meanwhile, the Associated Press reported that Busch became unresponsive while testing inside the Chevrolet racing simulator on Wednesday.
At the time of his death, Busch competed in his 22nd full-time NASCAR Cup Series season.
Over his legendary career, Busch captured two Cup Series championships. He recorded 63 race victories, cementing himself as one of the most accomplished drivers of his generation.
