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Rio Olympic 100-metre hurdles champion Brianna Rollins-McNeal has been provisionally suspended for a doping rules violation, the Athletics Integrity Unit (AIU) announced on Thursday.

This is not the first time that Brianna Rollins has been suspended. In 2016, she was suspended for failing to make herself available for testing three times during a 12-month period. That suspended was handed down by the United States Anti-doping Agency.

Brianna Rollins-McNeal. Photo credit: World Athletics

The 29-year-old is also the 2013 Moscow World Athletics Championships gold medallist.

The AIU said it charged Rollins-McNeal with “tampering within the results management process,” however, no further information was provided.

The Miami, Florida native is the fourth fastest all-time in the event. She owns a personal best of 12.26 which she achieved at the 2013 USATF championships in Des Moines, Iowa. She is a six-time winner in the Diamond League.