Police said they had identified the man but not the dead woman. The 51-year-old man was a tenant at the Ponga Rd property, and the owners are overseas.
Mr Lynch said there were indications of violence, but would not say if there were signs of intrusion.
The last known contact the man had with anyone was Friday night.
Later this afternoon police said ESR staff and a pathologist had been to the scene and there was evidence that a firearm was used at the scene.
"At this stage police are still unable to fully establish what has happened, and are keeping an open mind as to whether a third person or persons are involved,'' police said in a statement.
Mr Lynch said there was no need for the public to be afraid.
"Crimes like this are hardly ever random. I wouldn't be concerned if I lived in the community.
"Anyone with information on what happened at the address or who the woman might be is asked to contact police immediately.''
David Todd, who lives nearby on Coal Mine Rd, said police and armed offenders squad members were seen in the area this morning, and people leaving the area were being questioned by police.
He said he didn't know the residents at the address under investigation.
"It's a pretty quiet community around here but because we're sort of semi-rural you don't always get to know your neighbours.''
The area is made up of lifestyle properties and is about 10 minutes' drive from Drury township.
