A 17-year-old Canberra boy is behind bars, after shocking allegations he had developed detailed plans for public attacks, and had the necessary equipment to create a bomb in his bedroom.

The boy was arrested yesterday, as police swooped on his home, seizing his computer and phone.

Today he was charged with possessing violent extremist material obtained over the internet and possession of an imitation gun.

But prosecutor Christopher Moore told the ACT Children's Court, based on details in the court documents, more charges were likely to follow.

Boy allegedly planning to attack 'commie meeting or march'

The court heard the videos included offensive depictions of shootings, along with a game style video of the Christchurch shootings, images of Nazi flags, and Klu Klux Klan members.

Mr M

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