A man has died in a house fire in Perth's northern suburbs on Sunday morning.
The blaze broke out at a home on Curtis Way in Girrawheen about 4.45am.
More than 20 firefighters battled the fire but were unable to save a man who was found dead inside.
Police say the cause of the fire is undetermined and arson squad detectives are investigating the incident.
A reward of up to $50,000 is being offered for any information that leads to the conviction of an arsonist.