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Olympic 100 metres silver and bronze medallist Fred Kerley has been provisionally suspended by the Athletics Integrity Unit for whereabouts failures, the organisation said on Tuesday.
American Kerley, the 100m world champion in 2022, plans to contest the allegation that he violated anti-doping rules.
He withdrew from the U.S. track and field trials late last month, writing on social media that he was: "Taking some time out to get back on track."
He last competed a month ago at the Grand Sprint Series in Norwalk, California.
