An 18-year-old terror suspect linked to the fatal shooting of a Sydney police accountant can be detained without charge until Thursday after a Sydney court granted the Australian Federal Police (AFP) a fresh order.
The teenager, who was arrested in connection with investigations into 15-year-old Parramatta shooter Farhad Khalil Mohammad Jabar, was arrested in Wentworthville in Sydney's west last Wednesday following pre-dawn raids.
The 68-hour order, which followed a 100-hour order granted last week, came after NSW Premier Mike Baird stressed the importance of working with Muslim leaders.
"You can't do this alone," he said.
Mr Baird held a roundtable with Islamic leaders and NSW Police Commissioner Andrew Scipione in Sydney on Monday in response to the alleged murder of police accountant Curtis Cheng on October 2 by Jabar.
"What is clear is there's a determination around that table to make sure we do everything to stop these events from happening," Mr Baird said.
"There is a long journey on this.
"It's clear we have to do more across the community. People that have information understanding, awareness, concerns, we have to have a central point where they can respond and take those concerns."
The 18-year-old suspect attended the same school as Jabar, Arthur Phillip High School in Parramatta.
Three others were also arrested during the raids but all except the 18-year-old have been released without charge.
The AFP said legislation dictated that a person could not be detained for more than seven additional days.
Mr Scipione said police are only a small part of the solution.
"For community to actually say we want to take more responsibility to be part of this solution, but in fact to drive it is a good thing," he said.
Opposition Leader Luke Foley and Lakemba MP Jihad Dib also attended the discussions.
"We need ... to try and get to the hearts and minds of these young people who are feeling disengaged and disenfranchised with society," said Mr Dib, a former principal of Punchbowl Boys High School.
Meanwhile in Canberra, Prime Minister Malcolm Turnbull told parliament Australians must not let fanatics change "the way we live or the way we express ourselves".
He said it was crucial the threat from violent extremism was met with a united front.
"It is critical that all of us understand those who try to tag all Muslims with responsibility for the crimes of a tiny minority and convert that into a general hatred of all Muslims are undermining our national interest," he told parliament.
"They are making the work of the police and the security services and governments seeking to prevent violent extremism that much harder."
