Police expected to charge in relation to Parramatta shooting

The juvenile is one of more than a dozen people contained in a Federal Court order imposed on a Sydney terrorism suspect earlier this year, according to the ABC.

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.

“We’re shocked that a 12-year-old is on the police radar for these type of matters, absolutely”, Mr Colvin told the ABC on Wednesday night.

A few of the four suspects picked up were targeted in anti-terrorism raids a year ago which police claimed prevented a beheading plot, and attended the same mosque.

“The problem is getting worse for Australia, not better”.

An arrested man (left) and teen killer Farhad Jabar.

ABC reported on Wednesday that the 12-year-old boy was the youngest of 18 suspected extremists named in a court document in March.

It is believed these men provided Jabar with gun he shot Mr Cheng with. “We have this trend of them reaching out to people in their 20s, then their late teens”.

People of different faiths and cultures held a candlelit vigil for slain police worker Curtis Cheng last night.

“We will stand together to ensure that the harmony we are so proud of, the harmony that we have experienced in the past, unites us into the future”, Parramatta City Council Lord Mayor Paul Garrad said.

Police on Monday were granted permission to further detain him for 68 hours after an initial order allowing him to be kept for another 100 hours expired.

The comments by AFP Commissioner Andrew Colvin come ahead of a summit called by Prime Minister Malcolm Turnbull that will see police and intelligence chiefs from the states and territories as well as the AFP and ASIO.

Australia is holding a national conference of federal and state law enforcement officials on Thursday in Canberra.