WARNING: Distressing content
The bodies of a man, woman and young child found in two separate locations across northern Sydney have been identified as those of a mother, father and son.
The body of the father, aged in his 30s, was found at a townhouse on Watkins Rd in Baulkham Hills on Tuesday about 10.15am, following calls to police with concerns for his welfare.
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The bodies of the mother, aged in her 40s, and her son, aged seven, were found at a taekwondo studio on Daking St in North Parramatta about 1pm.
7NEWS understands the husband and wife were estranged.
7NEWS also understands the mother and son were stabbed inside a Taekwondo school, but their bodies were located in a nearby alleyway.
Emergency services covered up the windows to the studio on Tuesday to prevent anyone from seeing inside.
Police believe a knife may have been discarded inside a recycling business next door to the studio, but no weapon has been located at this stage.
NSW Police are investigating if the deaths are linked to a separate stabbing in North Parramatta on Monday.
A fourth person remains at Westmead Hospital after presenting with serious but non-life-threatening slash wounds overnight.
Police are yet to interview the man.
The Homicide Squad is investigating the incidents.
Multiple crime scenes have been established and are being examined by forensic officers.
