Jamaica smash relay record

Usain Bolt won his third gold as he anchored Jamaica to victory in 4x100 metres final.

Jamaica's Usain Bolt looks on before competing in the men's 100m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. Picture: AFP

LONDON - Olympic sprint champion Usain Bolt won his third gold of the Games when he anchored Jamaica to victory in a blistering men's 4x100 metres final as they retained their title in a world record 36.84 seconds on Saturday.

It was the same Jamaican quartet of Nesta Carter, Michael Frater, Yohan Blake and Bolt that had set the previous mark of 37.04 at the world championships in Daegu last year.

The United States team of Trell Kimmons, individual bronze medallist Justin Gatlin, Tyson Gay and Ryan Bailey won silver in 37.04 to equal the old record.

Canada finished third but were disqualified for a lane infringement, leaving the athletes in tears on the track as Trinidad and Tobago were awarded the bronze in 38.12. The Canadians have appealed against the decision.

U.S. lead-off man Kimmons got a flying start and the Americans appeared to have the initial edge but by the third leg Jamaica's 100 and 200 silver medallist Blake came off the bend level with rival Tyson Gay and once Bolt got the baton there was only ever going to be one winner.

To a tumultuous noise, Bolt pulled away from American Ryan Bailey and, for once, kept going all the way to the finish even dipping for the line.

Bolt, who now has six Olympic gold medals from two Games, wanted to keep the baton but track officials would not let him, resulting in boos from the 80-000 strong crowd.

The Jamaicans then went on a lap of honour, high-fiving and kissing members to the crowd.