MELBOURNE, Australia (AP) — A 16-year-old boy who was shot dead by police after stabbing a man in the Australian west coast city of Perth had been in a deradicalization program but had no links to an alleged network of teen extremists in the east coast city of Sydney, authorities said.

The boy had participated in the federally funded Countering Violent Extremism program for two years but had no criminal record, Western Australia Police Minister Paul Papalia said Monday.

“The challenge we confront with people like the 16-year-old in this incident is that he’s known to hold views that are dangerous and potentially he could be radicalized,” Papalia told Australian Broadcasting Corp. “... but the problem with individuals like this is they can act at short notice without warning and be very dangerous.”

On the potential for the boy to have been radicalized, Prime Minister Anthony Albanese said he was concerned by social media pushing extreme positions.