A man has been taken to hospital suffering serious burns after a fire broke out in a unit at Kirrawee overnight.
Emergency services were called to a unit complex on Moona Road after reports of a fire.
On arrival officers found a unit well alight. The four occupants managed to escape, however, a man, aged 55, suffered significant burns and was taken to Royal North Shore Hospital where he remains in a serious condition.
Two women, aged 51 and 23, and a man aged 25, were all taken to St George Hospital suffering smoke inhalation.
The fire was extinguished, and a crime scene has now been established by detectives from Sutherland Shire Police Area Command as they investigate the cause of the fire.
Anyone with information about this incident is urged to contact Crime Stoppers: 1800 333 000 or https://nsw.crimestoppers.com.au. Information is treated in strict confidence.