STAFFORD, Conn. (AP) – Connecticut police are investigating the death of a 21-year-old motocross rider who died Saturday after crashing during practice at a racing track.

Anthony Hart of Henderson, Nev., was critically injured when he lost control of his motorcycle and hit an outer track barricade at Stafford Motor Speedway on Saturday, police said.

He died later Saturday at Hartford Hospital, where he had been taken by Life Star medical helicopter after the 3:30 p.m. incident.

Hart, known in racing circles as Tony, was the brother of motocross and reality television star Carey Hart, Grammy-winning pop star Pink’s former husband.

In a statement, track officials said Hart was practicing Saturday for the Doug Henry New England Grand Prix when the crash occurred.

The event was sanctioned by the American Motorcyclist Association, part of the AMA XTRM Supermoto Championship series.

This is the second year that Stafford Motor Speedway has hosted the event, in which racers compete on the track’s paved sections and on traditional dirt motocross sections in the infield.

His death remained under investigation Sunday as Connecticut state troopers awaited autopsy results on the cause and manner of Hart’s death.

The autopsy was not expected to be completed until Monday.

, a spokeswoman for the Office of the Chief Medical Examiner said Sunday.

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