Police are seen at a property in Bedford where up to five bodies have been discovered. Picture: AAPSource:AAP

Police are seen at a property in Bedford where up to five bodies have been discovered. Picture: AAPSource:AAP

THE five people found dead in a suburban Perth home are believed to be a mother, her children and their grandmother.

A man in his 20s surrendered himself at a regional WA police station, before officers visited a home on Coode Street in the suburb of Bedford.

When police entered, they discovered the bodies of two women and three young children. Police refused to say what the man told them - or how he was known to the victims.

The West Australian newspaper reported late last night that the victims included a mother, her three young children, and the grandmother of the children.

The identities have not been confirmed by police, but upset neighbours told reporters at the scene a couple with three young girls - aged three and 18-month-old twins - lived at the address.

The family had not been seen in recent days which has fuelled the anxiety of residents.

It's not known how long the bodies had been in the house.

Assistant commissioner Paul Steel confirmed the victims were both adults and children, but would not clarify their ages or genders.

"This is a tragic event and it will no doubt have an impact not only the family and friends of the deceased but for the whole of the community, those first responders who are faced with attending a scene with multiple deceased people," he told reporters today.

"It does send a ripple through the community of Western Australia."

He said specialist forensic police would investigate the scene, which was stil at a "very early stage".

"We are three hours into this investigation, I have no further detail in relation to those who are present at the location."

WA Police confirmed that the man was in custody and assisting policy with their inquiries. No charges had been laid by late last night.

"There are no ongoing concerns for public safety as a result of this incident."

Forensic police were still at the house early today.

WITNESS ACCOUNT

A distraught neighbour told WA Today that she often saw children playing in the front yard of the house at the center of police investigations.

"It's just so sad, they've got primary school aged kids and I thought it just couldn't be," she said. "How could someone do that to their own children? It's sickening to think someone could do that."

Another neighbour told WA Today she didn't know the home's occupants personally, but would often wave and say hello as she walked past.

"It's taken us by complete shock," she said. "It's just horrific on every level."

Neighbour Vagner de Souza told the ABC he regularly saw a family in the house's yard.

"Just a normal family, you would never imagine anything like that happening," he said.

The scene where up to five bodies have been found in suburban Perth. A) The corner of Coode St and Fort St. B) Beaufort St C) The city of Perth.Source:News Corp Australia

BREAKING: @WA_Police say five people including children have been found dead at a home in Bedford in Perth’s north east. Homicide detectives are there. We’ll bring you the latest LIVE in @7NewsPerth at 6pm. @7NewsSydney @7NewsMelbourne #perthnews pic.twitter.com/bRo51jrQK6 — Amelia Broun (@ameliabroun7) September 9, 2018

DEADLY TALLY

The incident comes just months after seven people were found dead at Margaret River. A mother, her four children and two grandparents were the victims of a mass shooting on a rural property in Osmington, in the state's South West.

The deaths of Katrina Miles, her parents Cynda and Peter Miles, who owned the property, and her four children has been described as Australia's worst mass shooting since the Port Arthur massacre. Two firearms were found at the Osmington address in what has been determined to be a murder-suicide.