The WA Police Homicide Squad has cordoned off part of a suburban Perth street as officers step up an investigation into the disappearance of a 32-year-old missing woman.
A 36-year-old man is assisting detectives with their inquiries.
Police were remaining tight-lipped about the investigation but said circumstances surrounding the disappearance were being treated as suspicious.
Dozens of forensic investigators descended on Weston Street in Carlisle early this morning and a large crime scene has been established.
The road is closed to all traffic and to pedestrians and cyclists.
Couple with children lived at home: neighbours
Neighbours said a couple with two young children lived at the house targeted by police.
One neighbour said detectives came knocking on their doors at about 9:00pm on Tuesday.
She said they collected hours of CCTV from the camera outside her house.
She was told by detectives her neighbour had not been seen since 5:30am on Friday.
Neighbours said they had not seen or heard anything out of the ordinary on the street in recent days.
They said the street was usually quiet and they had never seen anything like the police investigation before.
Carpet cleaner booked for today
This morning, a man arrived on the street in a van and said he had been booked to clean the carpets in two bedrooms at the house.
He said however he had not been able to reach the client on the phone yesterday.
The carpet cleaner decided to turn up today anyway but found a crime scene.
He was briefly interviewed by homicide detectives before he left.