SA Police said the Counter Terrorism and Security Section had arrested the boy, who was charged with possessing explosives instructions, information for terrorist acts and extremist material.

He was refused police bail to appear in the Adelaide Youth Court on Friday.

It is an offence in South Australia to possess extremist material and instructions on explosives.

Material that directly or indirectly encourages, glorifies, promotes or condones terrorist acts; or seeks support for, or justifies the carrying out of terrorist acts is considered to be extremist material.

Anyone who has information on the possession, production or distribution of extremist material can report it to the National Security Hotline on 1800 123 400 or Crime Stoppers at www.crimestopperssa.com.au, or 1800 333 000. Callers can remain anonymous.

– AAP