WARNING: INCLUDES GRAPHIC PICTURE CONTENT... Motorsport was mourning its second death in the space of a week after Italian Marco Simoncelli was killed in a crash at the Malaysian Moto GP.

Simoncelli's helmet was ripped off in the collision and he lay motionless on the track. He had been fourth at the end of the first lap. Italy's Marco Simoncelli leads the field Sunday in Malaysia.

Simoncelli's death comes a week after British IndyCar driver Dan Wheldon was killed in Las Vegas following a 15-car crash, external. BBC MotoGP presenter Matt Roberts said: "Marco lost his helmet ...

Whenever the helmet comes off, that’s not a good sign.” The tributes flooded in, including one from British rival Cal Crutchlow, who Tweeted: “RIP Marco Simoncelli! A great rider and all ...

A year ago to the day, Italian MotoGP star Marco Simoncelli tragically died in an ... making him instantly recognizable without his crash helmet - and his wild hair was matched on the track ...

World Superbike champion James Toseland told BBC Sport that Simoncelli was loved by all. "Marco was such a likeable ... the track but once he pulled his helmet on, he was the most ferocious ...

Earlier today in Malaysia, Italian motorcycle racer Marco Simoncelli passed away ... The two of them collided with Simoncelli, whose helmet came flying off. Simoncelli's passing comes just a ...

This video can not be played BBC's Matt Roberts reports from Sepang on the death of Italian rider Marco Simoncelli The 24-year-old had his helmet knocked off and was hit by both other riders.