\n<\/p>\n
He pledged allegiance to ISIS publicly on social media late last year and saw himself as an ISIS member thereafter.<\/p>\n
He aspired to travel to Syria or Iraq to live under ISIS\u2019s rule to support and fight for them, although he did not have a timeline in mind.<\/p>\n
He searched online for flights to Syria from Singapore, and for overseas shooting ranges where he could familiarise himself with weapons handling.<\/p>\n
\u201cThe youth also intended to use his future National Service stint to equip himself with firearms training, physical fitness and the mental resilience to fight for ISIS,\u201d said the ISD.<\/p>\n
He believed that ISIS-inspired attacks, such as the December 2025 Bondi Beach shooting, were justified as revenge for the loss of ISIS fighters in battle.<\/p>\n
\u201cHe viewed secular states which labelled ISIS as a terrorist organisation, such as Singapore, as enemies of ISIS, and attacks by ISIS against such states as justified,\u201d said the ISD.<\/p>\n
\u201cIn this regard, he aspired to conduct an attack in Singapore in furtherance of ISIS\u2019s cause, using \u2018pressure cooker\u2019 bombs that he had learnt about from an online video that he watched on the 2013 Boston Marathon bombing.\u201d<\/p>\n
The youth searched online for the cost of a pressure cooker and ways to make such a bomb, and also looked at purchasing potassium nitrate after learning about its use in the Qassam rockets used by Hamas in the Oct 7, 2023 attacks.<\/p>\n
\u201cAt the point of his arrest, he was in the early stages of planning. He had yet to develop a timeline, location or target for his attack, but had visualised the attack to be conducted in an urban setting, with multiple civilian casualties,\u201d said ISD.<\/p>\n
\u201cWhile the youth claimed not to have shared his attack aspirations with anyone, his family and friends appeared to have been aware of his extremist views, but none reported him to the authorities.\u201d<\/p>\n
The oldest of the detained trio was 19-year-old Tan Jun Jie, a Muslim convert who began practising Islam in 2022 after being introduced to the religion through social media content.<\/p>\n
In late 2022, he was exposed to the online extremist teachings of foreign preachers and subsequently to rigid and fundamentalist religious beliefs, which primed him to be susceptible to radical content that he later came across from January last year.<\/p>\n
By late 2025, he believed that armed violence was permissible against non-Muslims, Shi\u2019ite Muslims and other Muslims whose understanding of Islam deviated from his, as well as individuals who served secular governments.<\/p>\n
He took the pledge of allegiance to ISIS in January this year, and was willing to further the group\u2019s cause if called to do so, including carrying out attacks in Singapore.<\/p>\n
Tan wanted to travel overseas to undertake armed jihad and explored the possibility of travelling to Gaza to join Hamas under the guise of humanitarian work. He eventually abandoned this idea after deeming it not feasible.<\/p>\n
Next, he aimed to join ISIS in Somalia, and searched for flights from Singapore to the country, while conducting research on bomb-making techniques to prepare for armed conflict abroad.<\/p>\n
While he did not have any specific timeline in mind, Tan was prepared to carry out attacks locally if he was unable to travel to join ISIS in Somalia, said ISD.<\/p>\n
Tan formulated attack plans against two groups of targets in Singapore in end-2025, and was prepared to be killed in the process of carrying out his attacks.<\/p>\n
\u201cThe first plot involved targeting SAF personnel stationed at the entrance of Sembawang Air Base as he deemed them enemy combatants serving the \u2018kuffar government\u2019 of Singapore. The second plot was to target LGBTQ students at his school as he perceived their behaviour to be unIslamic,\u201d said the ISD.<\/p>\n
\u201cHe prioritised the targeting of SAF personnel as he believed that he could attain greater divine rewards and increase his likelihood of dying as a martyr.\u201d<\/p>\n
Early this year, Tan harboured violent ideations about killing his Muslim acquaintances who disagreed with his religious ideologies.<\/p>\n
\u201cHe had imagined, while preparing food at home, that his kitchen cleaver was a knife to slit his acquaintances\u2019 throats, mimicking executions in ISIS\u2019s propaganda videos,\u201d said the ISD.<\/p>\n
\u201cFortunately, Tan\u2019s acquaintances reported him to the authorities due to his extremist views and intention to enact violence locally and overseas.\u201d<\/p>\n
Tan also carried out cyberattacks in mid-2025 against the websites of several local and foreign Muslim organisations, using malware he had downloaded online to execute Distributed Denial-of-Service (DDoS) attacks.<\/p>\n
He had also recorded an oral declaration justifying his actions. However, as the websites remained accessible after his DDoS attempts, he decided against disseminating the recording as he was uncertain whether his attacks succeeded.<\/p>\n
The Singapore Police Force is separately investigating Tan for potential offences under the Computer Misuse Act.<\/p>\n<\/div>\n
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