Sydney - Olympic silver medallist Madeline Groves and two other Australian Olympic swimmers are facing possible two-year bans for missing drug tests, reports said on Sunday.
Groves, two-time Olympian Thomas Fraser-Holmes and Rio Olympic open water swimmer Jarrod Poort missed three drug tests in a 12-month period, the Sunday Telegraph reported.
Swimming Australia said it was informed by the Australian Sport Anti-Doping Authority (ASADA) and the sport's world governing body FINA that some team members may have failed to update their whereabouts.
"ASADA and FINA are yet to finalise their processes and to confirm the final outcomes in relation to these matters," SA said in a statement.
"Under ASADA and FINA rules, Swimming Australia is unable to announce details on any individual swimmers who may have failed to update their whereabouts appropriately until ASADA and FINA have completed their process."
Athletes are required to keep their whereabouts updated for the purpose of drug testing.
"It was disappointing that the information had been leaked before the relevant organisations had concluded the matters under a thorough and fair process for all involved," SA chief executive Mark Anderson added.
Anderson said Australian swimmers were reminded about anti-doping protocols as recently as last month's national championships in Brisbane.
"I have very clearly and very strongly reminded our team that you can never switch off from ensuring your whereabouts is accurate," he said.
"As an athlete it is a non-negotiable, you must be available for testing every single day of the four-year cycle."
Groves claimed the silver medal in the 200m butterfly at last year's Rio Olympics.
ASADA said at the point of each missed test, athletes have the opportunity to put forward an explanation before a missed-test declaration was made.