Japanese rider Shoya Tomizawa has died as a result of injuries sustained in today's Moto2 race at Misano.
The 19-year-old was running fourth when he crashed in front of Alex de Angelis and Scott Redding, and was hit at speed by both riders.
He was taken to hospital in Riccione where he was pronounced dead at 14.20 local time.
Tomizawa had been one of the sensations of the inaugural Moto2 season. He had been a frontrunner in Japanese 125cc and 250cc racing, but only had a handful of wildcard appearances and a season in the 250cc midfield under his belt on the world stage prior to 2010.
He instantly took to Moto2 though, charging to a historic victory for Technomag-CIP in the series' first ever race in Qatar.
Tomizawa proved that result was no one-off by staying with the frontrunners all season, taking pole positions at Jerez and Brno. He was seventh in the championship heading to Misano this weekend.
Of the other riders involved in the fatal accident, de Angelis walked away uninjured, while Redding is receiving treatment at the circuit but is reported to be awake and alert.