2011 Malaysian motorcycle Grand Prix

The 2011 Malaysian motorcycle Grand Prix was the seventeenth round of the 2011 Grand Prix motorcycle racing season. It took place on the weekend of 21–23 October 2011 at the Sepang International Circuit, but the MotoGP race was red-flagged and subsequently cancelled after two laps due to a serious accident involving Marco Simoncelli. Simoncelli fell while running fourth, his bike and body veering across the path of Colin Edwards and Valentino Rossi. Simoncelli was fatally struck in the head and chest by the two bikes. He was taken straight to the circuit's medical centre, but died of his injuries shortly thereafter.