A Sydney teenager is awaiting a bail decision after a court heard he used an encrypted messaging app to try and obtain a gun to "terrorise" the "kafirs" on Anzac Day.
Prosecutors told a Sydney court on Monday the 16-year-old is an "imminent and direct threat" to Australians and advised a magistrate not to release him on bail.
Crown prosecutor Chris Choi said the boy, an electrical apprentice, tried to obtain a gun for an Anzac Day attack and, when that failed, a bomb manual.
He allegedly said he targeted April 25, "because here in Australia the kafir (non-Muslims) celebrate Anzac Day and I want to terrorise them on that day", Ms Choi said.
He allegedly sent a text on April 16, "I want to learn how to make a bomb".
The IS flag appeared in his messaging avatar, Ms Choi said.
The boy has pleaded not guilty to doing an act in preparation or planning for a terrorist act.
He first came under investigation by NSW's Joint Counter Terrorism Team in May 2015 and was consequently enrolled in a deradicalisation program which the prosecutor said had failed.
But the teenager's father, who denied knowledge of the alleged plot, said he was prepared to place his life savings on the line in the form of the family's $1.2 million home to guarantee his son would comply with strict bail conditions.
The conditions included no access to electronic devices, an ankle bracelet for monitoring, and effective house arrest.
"To get my son back home I would do anything ... I love him with all my heart," the visibly upset father told Magistrate Christine Haskett.
He is currently being held in isolation, and defence lawyer Zemarai Khatiz said keeping him in custody pending trial would have a permanent and irreversible psychological impact on the teenager, who a psychologist diagnosed with severe depression and symptoms of anxiety.
Magistrate Haskett is due to deliver her decision on Thursday afternoon.
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