SINGAPORE, July 28 — Three Singaporean teenagers, aged 14 to 19, have been detained under the Internal Security Act (ISA) after they were self-radicalised by violent extremist...

A 14-year-old boy created a 21-page manifesto detailing an attack on his schoolmates and teachers and admitted he would have carried out the stabbings.

The teens, aged 14 to 19, were held under the Internal Security Act, which allows for detention without trial.