Worshippers at a mosque in Parramatta in west Sydney will be today told to leave Australia if they don't like living there.
It's the message the Mosque's Chairman said he would give in his first sermon since a teenage extremist, who attended the mosque, shot dead a man outside the New South Wales police headquarters last week.
Investigators have focussed on the prayer hall since anti-terror raids a year ago and police believe the mosque in Sydney's west is where the teen was given his weapon.
The ABC says Mosque Chairman Neil El-Kadomi is expected to tell attendees during Friday prayers that if they don't like Australia, to leave.
It's been reported he will tell parents to take more interest in their children to prevent radicalisation.
Meanwhile, Prime Minister Malcolm Turnbull has held a face-to-face meeting with Muslim leaders in Sydney to discuss countering violent extremism.
Mr Turnbull said the only way to counter such attacks was to work with the Muslim community and not create division.
"To ensure that we can take on this scourge which of course is as much a threat if not more so to the Muslim community than it is to the whole Australian community," said Mr Turnbull.
Muslim leaders are planning to contact the family of the teenager, who was shot dead by the police after he killed the police worker.
Australia's Grand Mufti Ibrahim Abu Mohammed and other senior leaders have gathered in Sydney to denounce extremism after the shooting.
Dr Mohamed said a very small number of Australian Muslims are caught up in extremism but the teenage gunman's motives were still unclear.
"We will commence on communications with the two families, the victim and the doer [perpetrator], before we determine what kind of role we can do as a remedy for this painful crime."
Several agencies are investigating how the 15-year-old became radicalised by Islamic extremists.