A teenager who stabbed a man in a Bunnings car park before he was fatally shot by WA police had been taking part in a de-radicalisation support program.

CCTV footage has emerged showing the dramatic moment police shot dead the “radicalised” 16-year-old in the car park at Willetton in Perth’s south on Saturday night.

Armed with a large kitchen knife, the teen stabbed a man in the back in a terrifying attack in the Bunnings car park.

CCTV shows a group of police later surrounding the teen and ordering him to drop the weapon.

Bodyworn footage of the incident shows the teen approaching police who deployed their Tasers.

But that warning did not have the “desired effect”, WA Police Commissioner Col Blanch said.

The teen then moved towards a constable, who fired a single fatal shot, Blanch said.

He said the boy, known to police, had mental health and online radicalisation issues and had been part of a support program treating extremism since 2022.

Police approached the teenager who then ‘rushed’ at officers. Photo: CCTV

When officers arrived at the scene, they didn’t know a man had been stabbed in the car park.

The victim, whose age has not been made public, is in a serious but stable condition in hospital.

Blanch said the attack appeared to be random as the injured man was not connected to the teen and just happened to be in the area at the time.

The police commissioner said there were several triple-zero calls about the incident, including from the teenager himself. He reportedly said he was going to “commit acts of violence” before hanging up.

Multiple calls also came from members of the state’s Muslim community concerned about his behaviour.

“We believe he sent relevant messages to some of those members who immediately responded by calling police,” Blanch said.

“Again, I do want to thank members of the Muslim community who did that, because that enabled us to identify rapidly who this individual was and respond quickly.”

He described the teen involved as a Caucasian male with mental health issues who was known to police.

Officers have been in contact with the teenager’s family.

“I think the family really do understand the situation that police were in, they are being very forthcoming with police,” Blanch said.

Police ordered the teen to drop the knife before he was shot. Photo: CCTV

WA Premier Roger Cook said there were “indications he had been radicalised online.”

“I want to reassure the community at this stage it appears that he acted solely and alone,” Cook said.

“Members of the WA Muslim community, who were concerned by his behaviour, contacted police prior to the incident and I thank them for their help.

“Our police responded within minutes. They encountered a very confronting situation but their rapid and professional response kept our community safe.”

Blanch said the constable who fired the shot and his colleagues were “hurting” but stressed they had done their job.

The ASIO director-general and Australian Federal Police commissioner have briefed Prime Minister Anthony Albanese on the incident.

“I’m advised there is no ongoing threat to the community on the information available,” Albanese said on social media.

“We are a peace-loving nation and there is no place for violent extremism in Australia.”

An investigation will examine the shooting and events leading up to the incident.

The Imam of Perth’s largest mosque, the Nasir Mosque, condemned the attack “in the strongest terms”.

“There is no place for violence in Islam,” Imam Syed Wadood Janud said.

“We appreciate the effort of the police to keep our communities safe.

“I also want to commend the local Muslim community who had flagged the individual prior with the police.”

His comments were backed by the Imam of the Mahmood Mosque in Adelaide, Imam Kamran Tahir, who previously served in Perth.

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-with AAP