Kyle Busch, a two-time Cup Series champion who won more races than anyone across NASCAR's three national series, has died at 41.
The Busch Family, Richard Childress Racing and NASCAR issued a joint statement on Thursday saying Busch had died after being hospitalised. No cause of death was given.
Busch's family said earlier he had been hospitalised with a "severe illness," three days before he was to compete at the Coca-Cola 600 at Charlotte Motor Speedway.