Police will resume a search for missing child Gus Lamont in remote South Australia, saying they'll expand the area of the hunt.

The search, involving police and members of the ADF, will start again tomorrow police said, as the child's disappearance remains a mystery.

Gus is believed to have wandered near the house on the property, which is about 40km south of Yunta, about 5pm on on Saturday, September 27.

Earlier this month the search was called off after no trace of Gus was found after six days, however police did later return to the site, Oak Park Station, on October 4.

They spent hours speaking with family and taking photos of the property.

From tomorrow, the search will "concentrate on an expanded area outside of the zone already searched extensively following Gus' disapp

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