Jamaica have broken the world record to win gold in the men's 4x100m in a time of 37.04sec at the world championships in Daegu.
Great Britain's relay team failed to complete the final handover and, in the process, Harry Aikines-Aryeetey collided with the American third-leg runner, Darvis Patton, sending him sprawling across the track and out of the race.
Bolt powered home to help Jamaica set the world record time after Nesta Carter led off the relay and handed to Michael Frater. Yohan Blake, the 100m world champion following the disqualification of Bolt in the final, ran the third leg and handed to Bolt. The Jamaicans bettered their own mark of 37.10sec which they ran to win gold at the Beijing Olympics in 2008.
France finished second in 38.20sec and Saint Kitts and Nevis took bronze in 38.49sec.