( CNN ) -- Usain Bolt has a simple message following a string of doping scandals that have cast a shadow over athletics and Jamaican sport : `` I 'm clean . '' A six-time Olympic gold medalist , Bolt was speaking publicly for the first time since his fellow Jamaican and elite sprinter Asafa Powell and Tyson Gay of the United States tested positive for banned substances . `` If you were following me since 2002 you would know that I have been doing phenomenal things since I was 15 , '' the 100 meter and 200 meter world record holder told reporters ahead of this weekend 's Diamond League meeting in London . `` I was the youngest person to win the world junior title at 15 , I ran the world junior record at 18 , the world youth record at 17 . `` I have broken every record there is to break , in every event I have ever done . For me , I have proven myself since I was 15 . For me , I have shown I was always going to be great . '' `` I was made to inspire people and to run . I was given a gift and that 's what I do . I 'm confident in myself and my team , the people I work with . And I know I am clean . '' Powell became the second high-profile Jamaican sprinter to fail a drugs test in a matter of weeks . Veronica Campbell-Brown , a a triple Olympic gold medalist , was given a provisional suspension in June . Powell , Campbell-Brown and Gay deny knowingly taking banned substances , as does Jamaican Sherone Simpson who also tested positive . Blog : Lifetime bans the only way to deter dopers ? Bolt revealed he had sent a text message to Powell , telling his compatriot `` to stay strong and focused . '' `` There are a lot of details yet to be discussed so I 'm just sitting and waiting to see the results and what 's what , '' added Bolt . `` There are a lot of things that have n't been done and have n't been said so I 'm just waiting to see what is going on . `` You have to be very careful as an athlete because right now there are a lot of things on the banned list . You have to keep up to date all of the time . It 's hard but that 's why you have a team to help you out with this kind of thing . '' Away from athletics , Jamaican sport was rocked by a fresh doping scandal after one of the Caribbean nation 's footballers become the latest sporting figure to fail a drugs test . The unnamed footballer failed a test carried out by the sport 's global governing body FIFA following last month 's World Cup qualifying match against Honduras . `` During the World Cup Qualifying match , Honduras vs Jamaica , on June 11 , 2013 a member of the Jamaican squad returned an adverse analytical finding on his urine sample , '' read a statement from the Jamaican Football Federation ( JFF ) . `` The testing was carried out by the FIFA . This means that the ensuing process will be managed by the FIFA . The player has been informed and we await further information from the FIFA . `` The JFF has taken this matter very seriously and a thorough investigation has already started by the chairman of the JFF Medical Committee . ''
Usain Bolt tells reporters `` I 'm clean '' ahead of London Diamond League meeting . The Jamaican sprinter is set to compete in the event on Sunday at Olympic Stadium in London. Gay and Powell both deny knowingly taking banned substances . A Jamaican international footballer fails a drugs test during a World Cup qualifier .