NSW Premier Mike Baird and Police Commissioner Andrew Scipione have met with Muslim community leaders to discuss the radicalisation of young people and community unrest following this month's murder of a police employee.

Curtis Cheng was shot and killed outside NSW Police headquarters at Parramatta on October 2.

NSW Premier Mike Baird is greeted by Grand Mufti Dr Ibrabim Abu Mohammed before the meeting. ( Fairfax Media )

The 17-year police force veteran was shot at close range by 15-year-old Farhad Jabar Khalil Mohammad who was later found to have been radicalised and his attack politically motivated and linked to terrorism.

Today about a dozen Muslim leaders, including Grand Mufti Dr Ibrahim Abu Mohammed, Samier Dandan from the Lebanese Muslim Association and the Muslim Women's Association's Maha Abdo, attended the meeting at Mr Baird's office.

Opposition Leader Luke Foley and Labor colleague Jihad Dib also attended the talks.

The Premier said the meeting concluded with a resounding determination to prevent radicalisation in young people.

He said programs to combat the problem would be rolled out in due course.

Muslim community leaders gathered last week and denounced extremism. ( ABC News: Mohamed Taha )

Last week, Muslim leaders including the Grand Mufti came together to denounce extremism and express their condolences following the attack.

Dr Mohammed said he and other leaders rejected all forms of terrorist acts.

"I reiterate that the sanctity of human life is guaranteed in Islam," he said.

"Generally speaking and utterly, we refuse and reject any form of terrorist activities, whether this, if it's proven to be a terrorist act, or any other one."

He said Islamic leaders in Sydney were making "every effort" to deal with the issue of radicalisation and called on those who supported the Parramatta shooting to "stop messing with Australia".