Former 400m world champion Amantle Montsho has been banned for two years for doping after testing positive at last year's Commonwealth Games.
The 31-year-old from Botswana tested positive for the stimulant methylhexaneamine after the 400m final in Glasgow, where she finished fourth.
Her "A" and back-up "B" samples both returned positive results.
The 2011 world champion has indicated she will appeal and has a deadline of Wednesday, 25 March.
The ban was decided on by a disciplinary committee at the end of last month and sent to governing body the International Association of Athletics Federations (IAAF) before being made public.
In 2010 Montsho was the first Botswana athlete to become a Commonwealth champion and a year later won her country's first world championship gold.