Five Jamaican athletes have tested positive for a banned substance, a Jamaican doping official said on Friday.
"I can confirm that five athletes tested positive for a minor substance, but a further announcement will be made," an official said on condition of anonymity.
The positive tests were returned during the national athletics championship in Kingston last month, the official said.
The source said none of the athletes were 'stars' at the Beijing Olympic Games last year.
Earlier on Friday, local media reported that three men and two women had failed tests at the Jamaican nationals.
