Singapore Detains Three Self-Radicalized Teens Over Plots to Attack LGBTQ+ Students

Singapore’s Internal Security Department (ISD) has detained three self-radicalized individuals — a 19-year-old and two teenage boys, ages 14 and 15 — after uncovering separate plots that included a planned knife attack targeting LGBTQ+ students. All three were taken into custody between April and June, and the ISD disclosed the cases publicly in late July. In each instance, the plots were stopped before anyone was hurt, after people close to the individuals noticed changes in behavior and reported them.

Three plots, three paths to radicalization

The oldest of the three, Tan Jun Jie, converted to Islam in 2022 and, according to the ISD, became radicalized through online exposure to ISIS propaganda. By January 2025, investigators say he had come to believe that violence against people he considered “disbelievers” was justified, and he began planning a knife attack targeting LGBTQ+ students at his former college as well as Air Force cadets. He was reported to authorities by Muslim acquaintances who recognized signs of his radicalization and intervened.

The 14-year-old, self-radicalized largely through gaming platforms and online content, absorbed a mix of extremist ideologies that the ISD described as internally contradictory — he reportedly expressed identification with the perpetrator of the 2016 Pulse nightclub shooting in Orlando alongside white supremacist figures, while also adopting elements of ISIS ideology. He had planned an attack on classmates timed to summer break. Classmates and teachers noticed warning signs in the weeks beforehand and alerted authorities before he could act.

The 15-year-old had pledged allegiance to ISIS online and modeled a planned attack on the 2013 Boston Marathon bombing.

What stopped them

Singapore’s ISD has emphasized a consistent pattern in how each plot was disrupted: not a security dragnet, but people in the individuals’ own lives — friends, classmates, teachers — noticing something wrong and saying something. That’s consistent with how counter-extremism researchers generally describe successful interventions: family members, teachers, and peers are more likely than automated systems to catch early behavioral changes, provided they know what to look for and feel safe reporting it.

All three individuals remain in ISD detention. Singapore’s Internal Security Act allows for detention without trial in cases the government classifies as security threats, a legal framework that has drawn its own criticism from human rights groups over the years, independent of the underlying facts of any individual case.

Why this matters beyond Singapore

Plots targeting LGBTQ+ people specifically as symbolic “enemies” — rather than incidental targets — echo a pattern researchers have tracked across a range of ideologies for years, from the 2016 Pulse nightclub attack to more recent cases in Europe and North America. What’s notable here is the ideological blending: extremist material doesn’t arrive to young people in neat, single-source packages anymore. Investigators increasingly describe teenagers picking up fragments from disparate — sometimes contradictory — extremist traditions online and stitching together a personal justification for violence, with LGBTQ+ people, among other groups, cast as targets in more than one of those traditions simultaneously.

For Singapore’s LGBTQ+ community, which operates under its own legal constraints — private consensual sex between men was only decriminalized in 2022, and the government has been explicit that it does not intend to recognize same-sex marriage — the disclosure is a reminder that online radicalization threatens queer people even in places where the immediate legal picture is improving. It’s also, notably, a story about intervention working: three plots stopped before they became attacks, because people paid attention and acted on what they saw.

Sources: LGBTQ Nation, PinkNews, The Star, The Independent Singapore.