Olympic hurdles champion Brianna Rollins-McNeal has been provisionally suspended for a doping rules violation, the Athletics Integrity Unit said Thursday.

Rollins-McNeal won gold in the 100-metre&nbsp;hurdles at the 2016 Rio de Janeiro Olympics. The 29-year-old American was also world champion in 2013.&nbsp;

100-metre world champion Christian Coleman appeals doping ban

Men's 100-metre world champion Christian Coleman has formally appealed against his two-year ban for missing multiple doping tests, the Court of Arbitration for Sport said Thursday.

American sprinter Christian Coleman, see above at an indoor event in February, has appealed his ban according to the Court of Arbitration for Sport. 

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American sprinter Christian Coleman, see above at an indoor event in February of 2020, has his ban reduced by the Court of Arbitration for Sport from two years to 18 months, but it will not expire until after the Tokyo Games.

The AIU said it charged Rollins-McNeal with "tampering within the results management process," but did not specify details of the case.

The AIU cited a section in the World Anti-Doping Code that covers "conduct which subverts the doping control process."

The code gives one example as "altering identification numbers on a doping control form during testing."

Rollins-McNeal is the fourth fastest woman in history in her event. She clocked 12.26 seconds at the U.S. national championships.

American Brianna Rollins-McNeal, seen above holding her gold medal following her win in the 100-metre hurdles at the 2016 Rio Olympics, was suspended Thursday for violating doping rules by the Athletics Integrity Unit.

Former Olympic hurdles champ Brianna Rollins-McNeal suspended for doping violation

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