The 14-year-old had communicated with terror suspects in Australia , authorities said . A 15-year-old boy was arrested on suspicion of planning a terrorist attack and is being held at the juvenile detention center for youths in Sydney, police said. The teenager encouraged others to attack a parade and behead someone in Australia .
The 14-year-old had communicated with terror suspects in Australia , authorities said . Police : The teenager encouraged others to attack a parade and behead someone in Australia .