Three people seriously injured in 'deliberately lit' Adelaide house fire

Three people have been seriously injured in a fire believed to be deliberately lit at an Adelaide property.

Neighbours said they were woken by banging at their door and an inured woman outside, crying for help.

A distressed man was also heard moaning on the street.

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Police and fire crews were called to the Calendar Place residence in Woodville West just before 4am after reports of a house fire.

A man and two women who were home at the time were taken to the Royal Adelaide Hospital with serious injuries.

When authorities arrived the fire had already been extinguished.

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Crime scene investigators and detectives are investigating the fire and believe it was deliberately lit.

A crime scene has been established and the street cordoned off.

Anyone who saw or heard any suspicious activity or has information that may assist the investigation is asked to contact Crime Stoppers on 1800 333 000 or online at www.crimestopperssa.com.au