Bolt sets new 100m world record

Usain Bolt set a new 100m world record by clocking 9.72 seconds at the Reebok Grand Prix meeting in New York.

The 21-year-old Jamaican, who won silver in the 200m at last year's World Championships, was running the 100m for just the fifth time.

Bolt beats the previous best of 9.74 set by compatriot Asafa Powell.

"I wasn't looking for a world record but it was there for the taking so I just went out there and ran my best race," he said.

Bolt beat Tyson Gay into second place, with the American running a personal best of 9.85....

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