A fire has ripped through a terrace house in Surry Hills in inner Sydney.
Fire crews arrived at the property after 4am on Monday to find it well alight, a NSW Fire & Rescue spokesman said.
Cleveland Street was closed in both directions as firefighters put out the blaze. No one was at home.
Adjacent homes were evacuated as a precaution, but no injuries have been reported, police said.
A crime scene was established at the scene and initial inquiries suggest the fire may be suspicious.
In a separate incident, fire crews had to force their way into a townhouse in the inner-west suburb of Burwood early on Monday following reports smoke was billowing from the building.
Emergency services were called to Britannia Avenue about 1.20am and found a townhouse alight, police said.
An adjacent unit was evacuated as a precaution while firefighters from worked to control the blaze.
No one was at home when the fire broke out and there have been no reports of injuries.
The cause of the fire is still to be determined.
AAP, Fairfax MediaÂ