A man arrested after a woman and two children were found dead in an alleged domestic violence attack at a Sydney home called Triple Zero himself, police say.
Emergency services called to a "particularly violent scene" on Raymond Ave in Campbelltown just before 8pm today found a woman believed to be in her mid-40s and two children under 10 inside the home.
Acting Superintendent Michael Moroney wouldn't confirm reports the man was the woman's husband and father to the children but said all four knew each other.
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"Whilst I can't give you specific information in regards to how they passed, what I can tell you is all three persons sustained significant injuries, and it was a particularly violent crime scene," he said late tonight.
A 48-year-old man was arrested at the scene and taken to Campbelltown police station but had not been formally interviewed or charged.
Moroney wouldn't go into details about any weapons being seized, saying only "a number of items" were found inside but no guns.
He said the bodies "were located in various parts of the premises" and it was believed the 48-year-old man called emergency services.
"I haven't listened to the Triple Zero call," he said.
"Broadly, quite broadly, the information was, an incident happened at that location and he was requesting police to that scene."
Moroney said the man had no history with police and there were no offenders believed to be outstanding.
There was no indication of mental health issues but that would form part of the police investigation.
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A large police presence remained into the night on the street, where police had established a crime scene.
The home was cordoned off with police tape and multiple police vehicles with flashing lights were parked up and down the street.
Police could be seen in the front yard of the home.
Campbelltown detectives are investigating with the help State Crime Command's homicide squad.
Police called on anyone with information to come forward.
The gruesome discovery came hours after police announced hundreds of people had been arrested in a statewide operation targeting repeat domestic violence offenders.
"This today appears to be not something that we had on our radar in terms of being known to police, but I can reassure the public that domestic violence is a number one priority for the NSW Police, and we will continue to prioritise DV offenders," Moroney said.
Support is available from the National Sexual Assault, Domestic and Family Violence Counselling Service at 1800RESPECT (1800 737 732).
