A Melbourne man accused of plotting a terrorist attack is the first alleged right-wing extremist to be charged under Commonwealth terror laws.
Phillip Michael Galea, 31, has been charged with collecting or making documents likely to facilitate a terrorist act and planning or preparing for a terrorist act.
The Victorian Joint Counter Terrorism Team swooped on four properties, including Galea's Braybrook home, on Saturday.
Police say there could be further arrests.
Federal Justice Minister Michael Keenan on Monday vowed if someone presented a threat to the Australian community "the police will take action".
"This is the first time in the history of Australia that we have used Commonwealth terrorism laws to charge someone who is alleged to have been a right-wing extremist," he told reporters in Perth.
Mr Keenan said the community was never under any threat while Galea was being investigated.
Police acted quickly to disrupt any attack from happening, he added.
"We've stopped nine terrorist attacks in Australia because of this approach."
Galea has been linked to anti-Islam groups and on social media has posted support for the True Blue Crew, the United Patriots Front and Reclaim Australia.
Victoria Police say further charges against Galea or his associates are possible.
"That's always a possibility given that we're in an early part of the investigation," Assistant Commissioner Ross Guenther told reporters on Monday when asked about the potential for further arrests.
Police are still finalising a statement of facts against Galea ahead of his next court appearance, scheduled for Tuesday.
Mr Guenther wouldn't elaborate on what Galea was planning except to say it involved "potential damage to property".
When Galea appeared in the Melbourne Magistrates Court on Sunday he declared: "I will be fighting these charges and I believe they are a conspiracy against the patriot movement."
But Mr Guenther denied there was any such conspiracy.
"There's not a conspiracy around the patriot movement, this is part of an ongoing investigation we've had in play for some time," he said.
Australian Federal Police Acting Assistant Commissioner Jennifer Hurst on Monday insisted the JCTT targeted "criminals and criminal activity, not ideologies or backgrounds".