Prime Minister Malcolm Turnbull has warned Australians fighting with Islamic State they "will be targeted" following the precision killing of top Australian terrorist Neil Prakash in Iraq. 
And Attorney-General George Brandis has revealed that Australian authorities were involved in identifying and locating Prakash, who was killed in a US air strike last Friday.
The remarks came as coalition countries gathering in Germany agreed they all needed to do more in the fight against IS.
Mr Turnbull said so-called foreign fighters who travelled to the Middle East to join the IS were enemies of Australia.
"We are unrelenting in the war against terror," he said.
"Australians who think they can go to Syria and Iraq and fight with Daesh have to recognise that they will be targeted. They will be targeted. They are waging war against Australia and they are enemies of Australia ..."
Mr Turnbull confirmed Prakash had been "a target for some time, as he should have been".
He declined to say how involved Australia had been in gathering the intelligence needed to launch the strike in the Iraqi city of Mosul, in which up to a dozen other jihadists were killed.
But Senator Brandis said "Australia did co-operate with the US in relation to the identification and location of Prakash".
Immigration Minister Peter Dutton also indicated Australian involvement in pinpointing the locality of Prakash.
"I just have nothing but praise for ASIO, for all of the intelli-gence and law enforcement and defence agencies who were involved," he said.