U.S. sprinter Sha'Carri Richardson has been suspended for one month after testing positive for marijuana, the U.S. Anti-Doping Agency announced Friday morning.
The positive test result invalidates Richardson's performance at the U.S. Olympic trials in Eugene, Oregon, where she won the women's 100-meter dash, and will prevent the 21-year-old from competing in her signature event at the Tokyo Olympics later this month. It is unclear if she will be selected for the women's 4x100 relay team.
Richardson issued an apology on NBC's "Today" show on Friday morning.
"I want to take responsibility for my actions," she said on NBC.