Dargu (South Korea): Usain Bolt anchored Jamaica to a world record time of 37.04 seconds in the final of the 4x100 metres relay at the world championships on Sunday.
The quartet of Nesta Carter, Michael Frater, Yohan Blake and Bolt bettered the mark of 37.10 seconds which the Jamaican team ran to win gold at the Beijing Olympics in 2008 to retain their world title.
It was the only world record set at the 13th world championships.
France finished second to win the silver medal in 38.20 seconds with Saint Kitts and Nevis claiming bronze in 38.49.
The American team failed to finish after their third-leg runner Darvis Patton clipped a British athlete and fell over before attempting to pass the baton to Walter Dix.
The British quartet also failed to finish.