CNN  — 

US track and field star Sha’Carri Richardson has been suspended for one month from the Olympic team after testing positive for THC, a chemical found in marijuana, the US Anti-Doping Agency (USADA) announced on Friday.

“The rules are clear, but this is heartbreaking on many levels; hopefully, her acceptance of responsibility and apology will be an important example to us all that we can successfully overcome our regrettable decisions, despite the costly consequences of this one to her,” said USADA CEO Travis T. Tygart in a press release.

Richardson appeared on NBC’s TODAY show on Friday morning and said: “I just want to take responsibility for my actions, I know what I did, I know what I’m supposed to do, I’m allowed not to do and I still made that decision. I’m not making an excuse or looking for any empathy in my case.”

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Richardson had booked her spot at the Tokyo Olympics with a runaway victory in the women’s 100m at the US Olympic track and field trials in Eugene, Oregon last month. Due to the positive test, her Olympic trials results were automatically disqualified and she will not be allowed to participate in her signature 100m race at the Tokyo Olympics later this month.

It’s unclear whether Richardson will miss the Games altogether. She may still be eligible to compete in another event besides the 100m, such as the 4x100m relay. CNN has reached out to Team USA for clarity.

Friday’s USADA statement reads: “Richardson’s competitive results obtained on June 19, 2021, including her Olympic qualifying results at the Team Trials, have been disqualified, and she forfeits any medals, points, and prizes. Beyond the one-month sanction, athlete eligibility for the Tokyo Games is determined by the USOPC and/or USA Track & Field eligibility rules.”