A leading terrorism expert has warned Australians face an 'extraordinarily high' risk of attack after a teenager who researched a mass casualty strike at the Sydney Opera House was spared prison. The 16-year-old was instead handed a three-year community corrections order, with Justice Stephen Campbell finding there was 'very little chance' of him reoffending.
Terrorism and radicalisation expert Dr Josh Roose said authorities are grappling with the threat of young people being radicalised online, citing the case as an example. 'The threat level is extraordinarily high,' he told Sunrise, warning that potential attacks could stem from a range of extremist ideologies, including Islamist extremism, the far right and lone actors.
The teenager, who cannot be identified for legal reasons, was first exposed to extremist content on TikTok after developing an interest in historical conquests. The court heard he subsequently viewed increasingly violent material, including content from Al Qaeda and Islamic State. He sought online instructions on making a pressure cooker bomb and researched the Sydney Marathon finish line near the Opera House as a potential target.
However, Justice Campbell said the level of planning was at the least serious end of the scale. He noted that the teenager had not taken steps to obtain materials or settle on a date, and his communications showed a 'high level of naivety'. The judge accepted the teenager was only '50/50' about following through and had shown sincere remorse, renouncing his extremist ideology.
The teenager was arrested at his Western Sydney home in August 2024 and pleaded guilty in August 2026. His parents, who were from the persecuted Hazara minority in Afghanistan, were supportive and had friends from diverse cultural and religious backgrounds. They counselled their son that extremism was against their interpretation of Islam. Justice Campbell said the teen's rehabilitation prospects were excellent.
As part of the sentence, the teenager must comply with strict conditions, including handing over his phone password to a youth justice officer and not having access to encrypted messaging apps. Dr Roose noted the case highlights the importance of taking seriously the threat posed by younger people, who are being radicalised at much younger ages both in Australia and globally.
Analysis
Why This Matters
- The case underscores the persistent threat of youth radicalisation and the complexities of sentencing juveniles in terrorism cases.
- Dr Roose's warning points to broader national security concerns and the challenge of combating online extremist content.
- The outcome may influence how similar cases involving young offenders are handled in the future.
Background
The teenager was first radicalised through TikTok, moving from historical interests to violent extremist content. Over five weeks in 2024, he shared extremist material online, praised Al Qaeda, and attempted to contact the Boston Marathon bomber. He was arrested before taking any concrete steps toward an attack.
Key Perspectives
Dr Josh Roose: Warns the terror threat level is extraordinarily high, with youth radicalisation a growing issue. He noted the teenager's age and family support may have influenced the sentencing.
Justice Stephen Campbell: Found the teenager was not determined to carry out an attack, showed genuine remorse, and has little chance of reoffending, emphasising rehabilitation.
What to Watch
- The teenager's compliance with the community corrections order, particularly restrictions on encrypted platforms.
- ASIO's assessment of the terror threat level and any updates from Director-General Mike Burgess.
- Ongoing efforts by authorities to monitor and counter online radicalisation of young people.
Checked
12 claims in this story checked against 2 sources: 11 supported.
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- SupportedA terrorism expert warned Australians faced an “extraordinarily high” risk of attack.7NEWS: “Australians are facing an extraordinarily high risk of a terrorist attack, with a leading expert warning authorities are increasingly grappling with the threat of young people being radicalised online.”
- SupportedThe teenager was spared prison and sentenced to a three-year community corrections order.7NEWS: “His warning comes after a teenager who researched plans for a mass casualty attack at the Sydney Opera House was spared jail, instead being sentenced to a three-year community corrections order.”
- SupportedDr Josh Roose said the threat posed by younger people should be taken seriously.7NEWS: “Roose said the circumstances of the case highlighted the importance of taking seriously the threat posed by younger people.”
- SupportedJustice Campbell found there was “very little chance” the teenager would reoffend.7NEWS: “He was satisfied the teenager had shown sincere remorse and renounced his extremist ideology, finding there was very little chance of him reoffending.”
- Partly supportedRoose warned potential attacks could come from Islamist extremism, the far right and lone actors.7NEWS: ““We’re talking here about a range of different potential attacks coming from Islamist extremism, the far right, the conspiratorial lone actor extremism,” he said.”
- SupportedThe teenager was first exposed to extremist content on TikTok after becoming interested in historical conquests.7NEWS: “The teenager, who cannot be identified for legal reasons, was first exposed to extremist content on TikTok after developing an interest in historical conquests, including the Crusades.”
- SupportedThe teenager sought online instructions for making a pressure cooker bomb.Just In: “The court heard the teen had sought out online instructions about how to make a pressure-cooker bomb and researched potential target locations, including the finishing line of the Sydney Marathon at the Sydney Opera House.”
- SupportedHe researched the Sydney Marathon finish line at the Opera House as a potential target.Just In: “The court heard the teen had sought out online instructions about how to make a pressure-cooker bomb and researched potential target locations, including the finishing line of the Sydney Marathon at the Sydney Opera House.”
- SupportedJustice Campbell said the planning was at the least serious end of the scale and the teenager had not obtained bomb materials or settled on an attack date.Just In: “In sentencing, Supreme Court Justice Stephen Campbell found the level of planning was at the least serious end of the scale. ... The judge also noted that the teen had not made any attempts to obtain the materials to make a bomb or settled on a date for an attack.”
- SupportedThe judge said the teenager’s communications showed a “high level of naivety”.Just In: “But the judge suggested the communications showed a “high level of naivety””
- SupportedJustice Campbell accepted the teenager was only “50/50” about following through with the plan.7NEWS: “Justice Stephen Campbell accepted the teenager was only “50/50” about following through with the plan and had not taken any actual steps towards executing it.”
- SupportedThe teenager was arrested at his Western Sydney home in August 2024 and pleaded guilty in August 2026.Just In: “The 16-year-old boy, who cannot be identified, had just turned 14 when he was arrested at his Western Sydney home by federal police in August 2024 and charged with committing acts in preparation for a terror attack. He pleaded guilty in August this year.”