Australia's youngest-ever terrorism suspect will spend two months behind bars after being refused bail in a Sydney court.
The 15-year-old schoolboy is accused of exchanging hundreds of calls and texts in 2014 with a group of men allegedly plotting terror attacks on key government buildings including federal police headquarters.
The boy's distraught family vowed to fight for his release after he was refused bail in the Parramatta Children's Court on Friday.
His lawyer also confirmed his client would appeal the decision.
The teenager will remain in jail until February 5 when his matter is due before the courts.
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One of his co-accused, 20-year-old Ibrahim Ghazzawy, will also remain in custody after not applying for bail in Campbelltown Local Court on Friday.
Ghazzawy is expected to face court by videolink on January 20.
Police had kept both Ghazzawy and the boy under surveillance for at least 18 months and allege that in one 2014 text the boy used the word "banana" as a code word for "firearm".
"I am going to get to paradise through banana. God is great, no God but Allah," the text read.
He also spoke of his uncle's "banana" licence and spoke of going to check out some "bananas", the court heard.
Court documents reveal the group of accused terror conspirators allegedly used "party" as code for meeting or terrorist attack and "wedding date" for the date of the attack.
Members of the group are accused of gathering firearms and ammunition in preparation for the attacks.
Police raided the accused's house in December 2014 and allegedly seized photos of the boy brandishing a firearm, as well as photos saved to his phone of beheadings and Islamic extremists.
