Usain Bolt sad about positive drugs tests for teammatesUsain Bolt expressed his shock at the news that five Jamaican athletes have been tested positive for banned substances and termed the incident as a backward step for the sport.

Though the involved athletes have not been named but it is believed that at least two belong to the Racers Track Club, the same club as Bolt, and are coached by Glen Mills.

The triple world record holder, who won the 100m in 9.91sec in the London Grand Prix at Crystal Palace, said that it is disturbing to know that there are still drugs in the sport.