Australia's Prime Minister Tony Abbott has confirmed Parliament House in Canberra has been a target for terrorists and security will be beefed up.
Mr Abbott said a review of security at the building was conducted after the potential threats were identified.
"One of the first consequences of the review of security has been moves to put Australian Federal Police back in charge of internal as well as external security," he told the Nine Network today from Kirribilli House in Sydney.
About 5000 people work in Parliament House when it sits and it's a major attraction in Canberra for tourists and groups of schoolchildren.
Asked if people would be safe, Mr Abbott said "it is a safe country but we have to be aware there are people ... who would do us harm."
This morning, ONE News' Australian correspondent Steve Marshall highlighted The Daily Telegraph's reports that the Prime Minister and other "high level officials" were identified by police and intelligence agencies as "prime targets" in a potential plan to attack Parliament House.
Speaking from Sydney, Marshall told TVNZ's Breakfast programme that the newspaper is reporting Australian intelligence agencies picked up "chatter" that revealed the pre-planning of the alleged attack.
The Australian Federal Police (AFP) has not ruled out further arrests following raids in Sydney and Brisbane yesterday. Police are expected to continue searching some properties today as part of the major operation into the alleged terror plots.
Following yesterday's dawn raids, Sydney man Omarjan Azari has faced court charged with preparing a terrorist plan involving what police alleged was "random selection" of members of the public for execution by beheading.
A 24-year-old from Merrylands in Sydney's west was charged with the possession of an unauthorised weapon and possessing ammunition without a licence. He has been bailed to appear at Fairfield Local Court on September 24.
Two women were also issued with court attendance notices. Nine people were released from custody in Sydney while others were detained for questioning. More than 800 police executed 25 raids in 12 suburbs.