New South Wales police have arrested a 16-year-old female and a 20-year-old male as part of the city's ongoing counter-terrorism operation.
Both of the alleged offenders were arrested on suspicion of sending money offshore to Islamic State. The maximum sentence is 25 years imprisonment.
NSW Police Force Deputy Commissioner Catherine Burn said the man is the last member of the original Operation Appleby group to be charged with a criminal offence.
"I previously said that it was disturbing that we continue to deal with teenaged children in this environment. And today's arrest hasn't altered that position."
Australian Federal Police Deputy Commissioner National Security Michael Phelan moved to reassure the public the arrests are not in any way a sign of a possible attack on Australian soil.
"The charges these two people are expected to face relate to their alleged activities in raising funds and attempting to transfer those funds to an overseas terrorist organisation."