Inquiries are continuing after a house fire at Doonside this morning, NSW Police say.
Just before 12.30am tomorrow, emergency services were called to a house on Hill End Road, following reports a house was alight.
The occupants self evacuated and no one was injured.
A neighbouring property, car port and two vehicles were also damaged.
The blaze was extinguished by officers from Fire & Rescue NSW.
Police from Blacktown Local Area Command attended and commenced an investigation.
The fire is being treated as suspicious and inquiries are continuing.
A crime scene has been established and will be examined later today.
Police are urging anyone with information in relation to this incident to call Crime Stoppers.