Prime Minister Anthony Albanese has revealed an online ISIS video feed is being probed as a possible motivation behind Bondi shooting on Sunday.
Speaking in Canberra today, he said the National Security Committee had met six times since the attack.
It has identified an online video feed from Islamic State that "reinforces" the theory the gunmen were inspired by ISIS.
LIVE UPDATES: Online video reinforces ISIS link
"In responding to the mass murder that we witnessed on Sunday, we must consider both motivation and method," Albanese said.
"Today, we've been informed that the Office of National Intelligence has identified a regular online video feed from ISIS that reinforces that this was an ISIS-inspired attack.
"Further work is being done by the security agencies around motivation, and we'll continue to meet and provide them with whatever support they need at this difficult time."
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He also said Islamic extremism is just one of the "escalating" national security threats Australia is dealing with.
"I want to deal with all of the threats," he said.
"Whether it be extremist preparations of Islam leading to support for the ideology promoted by ISIS, whether it be about the issue of sovereign citizens killing police in Victoria and Queensland.
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"I am concerned about neo-Nazis thinking it is okay to march down our street dressed in black, not worrying about their faces being covered, explicitly promoting that as well."
The prime minister said threats to Australia's social structure had been around for a long time.
"There are issues that have escalated and we need to take action against all of them."
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