Result: Usain Bolt leads Jamaica to 4x100m gold

Usain Bolt charged down the home straight to win 4x100m gold for Jamaica in the final event of the 2011 World Championships in Daegu.

The Jamaican quartet also set a new world record in a time of 37.04.

Great Britain failed to pass the baton on the final changeover and as a result missed out on a potential medal.

Medal favourites USA also failed to finish after Darvis Patton collided with Britain's Harry Aikines-Aryeetey and tripped over as he approached the final changeover.

This appeared to distract the concentration of Marlon Devonish, who was running the third-leg and he failed to reach Aikines-Aryeetey.

France took a surprise silver medal with St Kitts and Nevis taking bronze.