Two adults and two children have escaped a house fire unharmed on the state's North-West coast early this morning.
About 1am today, emergency services attend the fire at a home in Frond Place, Devonport.
Police said that on arrival, the structure was ''well alight''.
Investigations revealed the cause of the fire was deliberate.
The fire damage was restricted to the kitchen and living areas, with the rest of the house suffering water and smoke damage.
The fire is now being investigated by the Devonport Criminal Investigation Branch.