WA Homicide Squad detectives have charged a man with murder after he allegedly assaulted the woman he lived with and set fire to their home in Perth’s south on Thursday night.

Police allege the 35-year-old man left the injured woman in the Warnbro house before setting it alight and fleeing with the woman’s three-year-old child.

Emergency services found the 30-year-old woman’s body on Friday morning.

The child was later taken to Rockingham Hospital for treatment for smoke inhalation.

The man has been charged with one count of murder and one of criminal damage by fire and is due to face court today.

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