Police said the teenager, who was 15 at the time he was arrested, was part of extreme right-wing online chat groups on platforms such as Telegram, Snapchat, TikTok and Wire.

Det Ch Supt James Dunkerley, head of Counter Terrorism Policing North East, said: "This case provides a stark reminder around the dangers of extreme content online that is accessible to the public and how individuals can be drawn into serious offending."

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