A man has been charged with murder following an inferno at a Sydney boarding house that has left at least three people dead.
Fire crews were called to the property on Probert St in Newtown at around 1am on Tuesday morning, finding the building well alight.
Five people were injured in the blaze including an 80-year-old man who remains in a critical condition in hospital.
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Investigators later discovered the bodies of three people inside the boarding home and still hold grave fears for a fourth person who is unaccounted for.
Detectives revealed on Monday that accelerant had been used and they were treating the fire as a homicide.
A jerry can was also reportedly found dumped nearby.
A 45-year-old Newtown man attended Surry Hills Police Station at about 7.40pm on Tuesday night.
He has since been charged with three counts of murder, and one count of destroy or damage property by fire or explosive more than $15,000 (DV).
The man was refused bail to appear at Central Local Court today.
Investigations are continuing.