A Jamaican track official has confirmed that Veronica Campbell-Brown, one of the country's most accomplished sprinters, has been provisionally suspended following a positive test for a banned substance.
The 31-year-old Campbell-Brown, a two-time Olympic 200-meter champion who has won seven Olympic medals in all, "voluntarily withdrew herself from competition,'' according to a statement posted on the website of the Jamaica Athletics Administrative Association and attributed to its president, Warren Blake.
"She has been provisionally suspended from competition awaiting the outcome of the disciplinary panel that will be empanelled to hear this case,'' the statement continued. "Further comment from us will await the outcome of this case."
The JAAA did not identify the banned substance for which Campbell-Brown tested positive, but various Jamaican news outlets have reported that it is a diuretic, banned by the World Anti-Doping Agency because of its potential use as a masking agent for other drugs.
Diuretics are "specified substances" under the WADA code, meaning that athletes can ask to reduce the mandatory two-year sanction for a first offense down to a matter of months or a public warning.
Campbell-Brown's manager, Claude Bryan, said in a press release quoted by the Jamaica Observer newspaper that Campbell-Brown intends to clear her name.
"Veronica is not a cheat, she has via hard work and dedication accomplished a record on the track which is absolutely remarkable,'' the release said.
"... She wholeheartedly apologises to her family, Jamaica, her sponsors, the governing body, the world athletics family, her supporters, as well as those she worked with in various non-athletic causes for any embarrassment and or hurt this devastating news has caused,'' the release continued.
The positive test was returned at the Jamaica Invitational in May. The competition at the island's national stadium was part of the International Association of Athletics Federations' World Challenge events.
Jamaican sprinters, led by Usain Bolt, had a banner run at the London Olympics, winning a record haul of 12 medals, surpassing the 11 they won in Beijing in 2008.
Campbell-Brown lives and trains in Clermont, Fla., and competed for the University of Arkansas for a season before turning pro.
Her case comes on the heels of a six-year doping suspension imposed on another Jamaican runner, 400-meter specialist Dominique Blake, for a second offense involving a banned stimulant. Sprinter Steve Mullings of Jamaica was banned for life after a second doping offense in late 2011.
Information from ESPN.com's Bonnie D. Ford and the Associated Press was used in this report.