Inquiries are continuing following a unit fire in Ashfield this morning, NSW Police say.
About 2am tomorrow, emergency services were called to a unit block on Cavill Avenue following reports one of the top-floor units was on fire.
One of the occupants of the unit, a man in his 30s, jumped from a window of the premises onto the ground below.
He was assessed by NSW Ambulance Paramedics before being taken to Royal Prince Alfred Hospital with a suspected broken leg.
Three other occupants in the unit – a man, woman, and a boy believed to be about five-years-old – were assisted out of the unit and taken to hospital to be treated for smoke inhalation.
Two other units in the complex were evacuated by police, with a total of nine other residents leaving the premises uninjured.
Fire & Rescue NSW officers extinguished the blaze; significant damage was caused to the unit.
Officers from Ashfield Local Area Command have established a crime scene, which will be forensically examined.
The cause of the fire is unknown.
Police are urging anyone with information in relation to this incident to call Crime Stoppers.