Australian prosecutors argued on Wednesday that a 15-year-old involved in a stabbing at a Sydney court wanted to attack Jewish community members but his attorney said his talk was nothing more than boasting.

One of four Sydney teenagers accused of planning a terrorist attack allegedly suggested targeting Jewish community members in a group chat, a court has heard.

Police say they found hand-drawn ISIS flags when they raided the 15-year-old’s bedroom after the alleged terror stabbing of a bishop in a Wakeley church.