COLORADO SPRINGS, Colo. — An American taekwondo athlete has been suspended for six months after testing positive for a prohibited substance.

The U.S. Anti-Doping Agency announced Thursday that Emilia Morrow has accepted a suspension after testing positive for the diuretics hydrochlorothiazide and chlorothiazide. The 17-year-old from Rockville, Md., was tied for 30th in the world rankings in the bantamweight division as of April 1 and is a five-time junior national champion.

Morrow was tested Feb. 14 at the U.S. Open in Las Vegas. She must forfeit the silver medal she won there in the bantam division.

Morrow will be suspended six months from Feb. 14. Diuretics are listed as "specified substances," for which bans may be shorter than the standard two-year period.