Police in South Australia have announced a significant development in the search for four-year-old Gus Lamont, who has been missing for two months. The search will now extend to several remote mine shafts, as authorities continue their efforts to locate the boy, who disappeared from his grandparents' home in the South Australian outback. The toddler was last seen at a sheep station in Oak Park, prompting a large-scale search operation involving police, soldiers, State Emergency Service (SES) crews, divers, and local volunteers. The latest phase of the search is expected to last up to three days and will utilise specialised equipment to examine six uncovered mine shafts located between 5.5km and 12km from where Gus was last seen. South Australia Police have indicated that these shafts had not been previously searched on foot, and they were unaware of their locations until now. Deputy Commissioner of Police Linda Williams stated, "We are determined to explore every avenue in an effort to locate Gus Lamont and provide some closure for his family. These searches will either locate evidence or eliminate these locations from further investigation by the Task Force." This new search effort follows a series of extensive ground and air searches in the area surrounding the Oak Park Station homestead. On October 31, police drained a large dam on the property, ruling out the possibility that Gus may have drowned. Prior to this, a four-day ground search was conducted at Oak Park Station, which followed an initial 10-day search. The ground searches have now expanded to a radius of 5.5km from the homestead, covering approximately 95 square kilometres on foot. The original search area was much larger, estimated at 470 square kilometres, and included the use of mounted operations and aerial support from Polair. Authorities remain committed to ensuring that all potential locations of interest are thoroughly investigated in the ongoing search for Gus Lamont.