A man is in custody after a mother-of-four was found dead inside a Warnbro home shortly after a fire broke out at the property.
Emergency services were called to the Currie Street home around 1am on Friday where they located Erica Hay deceased in a bedroom.
A 35-year-old man and a three-year-old girl escaped the fire and were taken to Rockingham Hospital for smoke inhalation.
The man, believed to be Ms Hay's partner, is now assisting homicide detectives with their investigation.
They are treating her death as a murder.
The toddler, understood to be the 30-year-old's daughter, is in a stable condition.
Charges are yet to be laid.
Pop-up ice skating rink glides back into Mandurah for winter school holidays
Federal opposition leader Angus Taylor sits down with local business owners in Mandurah
Police search for missing man last seen leaving Rockingham Hospital
West Aussies urged to be on high alert after surge in winter house fires
New $3.4 million boardwalk to be constructed at Lake Clifton thrombolites
City of Mandurah rolls out new tactile bin lids, accessibility stickers to support residents with low vision
Driver dies in hospital after Australind crash
Welfare concerns for woman with dementia last seen in Cooloongup
Charges laid over fatal West Coolup crash
