Italian rider Marco Simoncelli has died after a horrific crash at the Malaysian MotoGP in Sepang today. A star who would have become a superstar. A MotoGP statement read: "On Sunday, 23 October, during the MotoGP race at the Sepang International Circuit, San Carlo Honda Gresini's Italian rider Marco Simoncelli suffered a serious accident wherein he sustained critical injuries. The race was stopped immediately with the red flag and Simoncelli was transported by ambulance to the circuit medical centre where the medical staff worked to resuscitate him. Despite their efforts, Marco sadly succumbed to his injuries at 4.56pm local time [0956 BST]."