The family of a teenage terror suspect shot dead in Melbourne are shocked by what happened and want answers about how he became radicalised, police say.
A crowd gathered at an Afghan mosque in outer Melbourne on Friday to mourn 18-year-old Numan Haider, who was shot after stabbing two police officers outside Endeavour Hills police station on Tuesday night.
Victoria Police deputy commissioner Graham Ashton said Haider's family had been very co-operative with police and wanted answers about what led him to attack the officers.
"The family are very co-operative with police and they'll continue to be co-operative with police," he told reporters.
"They are very shocked obviously by what's happened, deeply saddened and shocked at the death of their son.
"They particularly want answers as to how he has become radicalised to the point he has done this act."
Terror suspect Numan Haider was shot dead after attacking two counter terrorism officers. Photo: 7News
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He said the family was deeply grieving deeply and had asked for privacy.
Haider's funeral was held in an Afghan mosque at Doveton.
A number of marked police cars and officers patrolled the area during the service.
Haider had his passport cancelled a week before attacking the officers and he had been seen with an ISIS flag at a Melbourne shopping centre.
Counter-terrorism officers had been aware of Haider for about three months and were concerned about his behaviour and escalating rhetoric, police say.
Mr Ashton said the Narre Warren teenager came from a good family but had become radicalised.
"This was a young man pretty clearly that had come from a good home, that seemed to be like any other young teenager growing up, and then he seems to have been influenced, he seems to have been radicalised by what he's seeing around him in social media and from others.
"The investigation's really focused on understanding that."