Drug-tainted Kentucky Derby-winner Medina Spirit died suddenly during a workout in California on Monday, officials said.
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The California Horse Racing Board said in a statement that the three-year-old colt, who is trained by legendary US trainer Bob Baffert, collapsed near the end of a morning workout at Santa Anita Park.
Medina Spirit, which failed a drug test after winning the Kentucky Derby earlier this year, will now undergo a postmortem to determine the cause of death.
