Detectives specializing in major crimes have made their way to the isolated town of Andamooka, investigating the disappearance of a mother under what authorities are calling suspicious circumstances.

Today, the search effort extended across the rugged terrain on the outskirts of Andamooka as teams scoured the area for any sign of the missing 41-year-old woman.

Joined by the State Emergency Service (SES), police focused their efforts on several locations east of the town, which are believed to be the last known spots where Graf was seen. Unfortunately, the search has yet to yield any new leads.

Authorities report that Graf vanished in the early hours of December 12.

Before her disappearance, she had traveled to Roxby Downs, where she purchased alcohol at the Roxby Tavern, and then returned to a social gathering in Andamooka.

Shortly after, she left and was meant to drive the short distance home, but she never arrived.

Her Ford Territory was found the next day bogged at a location east of the town called Blue Dam.

Detectives will continue their investigation tomorrow by door knocking in Andamooka.