Former 100 metres world record holder Asafa Powell of Jamaica was banned for 18 months by a Jamaican anti-doping governing body on Thursday after he tested positive for a banned substance last year in June.
The 31'year'old Jamaican tested positive for the stimulant named oxilophrine at last year's national championships and the ban has been backdated to June 21 2013 - the day he provided the sample. His ban will end on December 20.
Powell said he would lodge an appeal against the decision.
"This ruling is not only unfair, it is patently unjust," he said in a statement.