Usain Bolt told Reuters he would have no problem giving back one of his six Olympic gold medals if a Jamaican relay team-mate is confirmed to have failed a drugs test.

Nesta Carter, who helped the 4x100 team to Olympic and world championship titles, returned a doping violation for the banned stimulant methylhexanamine in a re-test of 454 samples from the Beijing Games, sources familiar with the case have told Reuters.

Carter’s “B” sample also came back positive, they said.

Jamaica’s Olympic association has confirmed it received notification from the International Olympic Committee (IOC) that one of its competitors had returned an adverse analytical result, but it has not named the athlete.

“It’s heartbreaking (the positive test) because over the years you’ve worked hard to accumulate gold medals and work hard to be a champion... but it’s just one of those things,” Bolt told Reuters yesterday.

“Things happen in life, so when it’s confirmed or whatever, if I need to give back my gold medal I’d have to give it back, it’s not a problem for me.”