A team of police officers and forensic experts have begun the excavation of a site at the New Castalloy factory in Adelaide, in the hope of finding signs that could finally resolve case of the three missing Beaumont children.
Jane, Arnna and Grant Beaumont, aged nine, seven and four, were reported missing on January 26, 1966 after failing to return home from a day at Glenelg Beach.
Their disappearance remains one of the nation’s most enduring missing persons cases.
The latest search will focus on an area of about six square metres.
The site once belonged to businessman Harry Phipps, who died in 2004.
Police say he remains one of about a dozen persons of interest in the case.

An Adelaide factory is to be dug up for a second time amid a new lead into the cold case disappearance of the Beaumont children. Source: AAP
That search failed to yield results, but last year a team of forensic scientists from Flinders University uncovered what police have described as a “small anomaly” about fifty metres from the original search area.
Detective Superintendent Des Bray said the discovery was enough to warrant further investigation.