Christian Coleman, the reigning world champion in the 100-meter dash, was suspended Wednesday by the Athletics Integrity Unit for missing drug tests.
The AIU updated its list of athletes on provisional suspension to include Coleman, hours after the American sprinter revealed details of the case.
He is temporarily banned from competition until a final decision at a hearing conducted under the World Athletics Anti-Doping Rules or the Integrity Code of Conduct.
Coleman said earlier on Twitter that drug testers were unable to find him Dec. 9 while he was at a nearby mall Christmas shopping. That was his third infraction in a 12-month period.
Athletes are required to list their whereabouts for an hour each day when they must be available to be tested.
A violation means an athlete either did not fill out forms telling authorities where…