Three women - two of whom tested positive for COVID-19 - have been charged for allegedly providing false information and skipping quarantine at the Queensland border.
They had returned to Brisbane from Melbourne via Sydney on July 21, and police allege they attended a party in Melbourne with 20 or 30 others.
The 19-year-old and two 21-year-old women have been charged with fraud and a count of providing misleading documents, facing a fine of AU$13,345 (NZ$14332) and up to five years in prison.
The three are in quarantine now and are due to appear in the Brisbane Magistrates Court on September 28.
Police Commissioner Katarina Carroll said on Thursday this criminal behaviour has put the community at risk.
"They went to extraordinary lengths to be deceitful and deceptive and, quite frankly, criminal in their behaviour - and it has put the community at risk," she said.
Deputy Commissioner Steve Gollschewski said this incident was a "deliberate act of deception."
"Our focus now is working with those young women to identify everywhere that they have been since they have come back into Queensland."
"We will continue to have the powers we have at our disposal, to try and get that information out so that we can absolutely focus on identifying where any risk might be for our community," he said.