A family of four has been found dead in a home in Sydney's northern suburbs, police say.
Officers were called to the home on Sir Thomas Mitchell Drive in Davidson at 11.20am on Monday after a concern for welfare report.
The bodies of a man, woman, girl and boy were found inside the home.
A dog was also found dead, police said.
Forensic officers are examining the property which is now a crime scene.
Police have cordoned off the street, and detectives from Homicide are investigating the circumstances of the deaths, News Corp Australia reports.
How the four died has not been determined.
A report will be prepared for the Coroner.
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