ROME: American World Superbike Honda rider Nicky Hayden, hit by a car in a bicycle accident in Italy last week, has died of his injuries, an Italian hospital said Monday.

Hayden, 36, who won the 2006 MotoGP world title, suffered severe chest and head injuries in the accident, which happened while he was training on his bicycle in central Italy, south of the seaside resort of Rimini.