BEIJING, Aug. 29 (Xinhua) -- Usain Bolt anchored Jamaica to the world 4x100m relay gold medal on Saturday, which was his third in Beijing and 11th in the world championships.

Bolt ran the final leg at a packed Bird's Nest National Stadium, leading the team to the winning time of 37.36 seconds after Nesta Carter, Asafa Powell and Nickel Ashmeade had perfect baton exchanges.

China claimed a historic silver medal in 38.01 seconds and Canada won bronze in 38.13.

The US foursome of 100m bronze and silver medalists Trayvon Bromell and Justin Gatlin, and fellow finalists Tyson Gay and Mike Rodgers were disqualified for overstepping the baton area.