CHICAGO (CBS) — A man died after falling off a dirt bike during a race Friday at Joliet Motorsports in southwest suburban Wilmington.

Kenneth Vandevelde, 45, of Mazon, was pronounced dead at 9:22 p.m. at Saint Joseph Medical Center in Joliet, according to the Will County coroner’s office.

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Vandevelde was the driver of a motorized dirt bike in a race at Joliet Motorsports, 27950 Kelly Rd. in Wilmington, and was seen falling off the bike, the coroner’s office said.

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Preliminary autopsy results Saturday did not reveal any injuries, but did reveal a heart condition, the coroner’s office said. Final cause and manner of death will be determined on later date, pending police, autopsy and toxicological reports.

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