Australia's official terror alert level has been raised to "probable" for the first time in a decade amid heightened community tensions and the war in Gaza. Security authorities believe the chance of a violent extremist act is now more likely, than when authorities lowered the alert level to "possible" in November 2022. The Prime Minister has pointed to an increase in radicalisation, while the ASIO boss has described Australia's security environment as 'volatile' and 'unpredictable.'