Swimming Australia has confirmed that Shayna Jack withdrew from the World Aquatics Championships after one of the tests she made found banned substances in her system.
Shayna Jack stated that she did not take the substance knowingly.
"Once Swimming Australia was made aware of the adverse test result, it immediately took action - in accordance with the national policy - to provisionally suspend Shayna from the Australian swim team while a process was underway and accompanied her back to Australia from a training camp being held in Japan," a by Swimming Australia said.
"The Swimming Australia policy also means that any Australian athlete under provisional suspension, while ASADA investigations are underway, cannot take part in any competition, meaning Shayna was unable to travel to Gwangju to compete at the 2019 World Championships."
"Under the process, all details are required to remain confidential until ASADA has completed its investigations, the athlete is afforded due process and an outcome determined."
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