Two people shot dead at NSW Police headquarters in western Sydney

The gunman, reportedly clad in black, approached the Parramatta-based building and fatally shot the IT worker at “point-blank range”, according to Sky News. “A critical incident team will now investigate all circumstances surrounding the incident”.

Mr Turnbull has labelled the shooting outside the NSW Police headquarters in Parramatta as “an act of terrorism”.

Scipione was to meet Cheng’s family on Saturday.

Aerial images from Channel Seven news showed what appeared to be two bodies covered in white sheets outside the headquarters of New South Wales police.

Scipione said it was a “brutal crime” and that the gunman clearly meant to engage police in a shoot out, adding that the case may have been one of “suicide by cop”.

Four five shots fired by man outside our office and in front of NSW police head quarters.

Scipione said that police had no warning of the attack and that the 15-year-old, of Iraqi-Kurdish background and born in Iran, had not been on the police radar, nor had he any criminal history.

Scipione said the employee was “deliberately targeted” by the gunman – who was wearing a “long pair of long trousers and a flowing top” and appeared to be operating alone – although he did not give further details.

Several children were also stuck inside a nearby daycare centre with anxious parents forced to congregate outside.

Another witness who lives in an apartment opposite police headquarters said he heard the shooting.

“This man was simply leaving work this afternoon, and he was gunned down”.

“I heard two gunshots, and a few of our employees went outside”, Edwin said.

Unity and cooperation is needed to combat the growing issued of radicalised young Australian, terrorism researcher Professor Greg Barton said.

Police allegedly thwarted an Islamic State terror plot to kill officers with knives and swords in Melbourne on Anzac Day. It was a cold-blooded murder targeting the NSW Police service.