The bodies of five people, including a woman and children, have been discovered at a suburban home in the Australian city of Perth.
As a result, police attended a home on Coode Street in Bedford today and made the grisly find.
The discovery of the bodies came after a man in his 20s visited a regional WA police station this morning.
Asst Comm. Steel said "up to five" people were found dead, including women and children.
The man, who is believed to be in his 20s, is now in custody and assisting police with their inquiries.
Assistant Commissioner Steel assured the community there are no ongoing safety concerns.
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A police officer stands outside a property where five people were found dead in a suburb of Perth, Australia, September 9, 2018.
"It's taken us by complete shock", she said.
"The WA Police Force will continue to apply our efforts to this matter as a priority, and the Homicide Squad will ensure a professional and meticulous investigation is undertaken", said a police statement.
Police have blocked off traffic around the scene of the incident and have a heavy presence there, with forensic officers among those on site.
Neighbour Vagner de Souza told the ABC he regularly saw a family in the house's yard.
Steel stressed that this was very early in the investigation so he could not provide many details.
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'This is a tragic event and will have an impact on family and friends, the community, and the emergency services who first responded to the tragic scene.
The incident marks the third tragic event in recent months in Western Australia. "I'm deeply saddened by what's happened".
It is yet to be determined how long the bodies had been there, Mr Steel added.
Maria Manfredini, a long-term resident in the area, described the incident as "tragic on every level".
The age and gender of those found has not yet been revealed, although it is thought "there was at least one woman".
In May, a 61-year-old man killed his wife, daughter and four grandchildren, before killing himself.
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