Police divers have scoured a dam as detectives continue in their hunt for William Tyrrell's remains.
A pair of police divers entered the dam on private property near the main search area about 10am on Thursday.
The two divers will search the water for any clues before making their way through a clearing back toward Batar Creek Road, where officers are still raking through soaked soil.
The specialised officers first arrived at the Batar Creek Road dig site in Kendall on the NSW mid north coast on Wednesday afternoon, where they inspected a rainwater tank at the home where William was last seen.
Police divers are pictured at William Tyrrell's foster grandmother's home after returning to inspect a rainwater tank
A GoPro-style camera fitted to a pole was lowered into the tank to film what was inside, while a group of officers watched via a monitoring screen.
It's understood the team will also be required at the primary dig site just 700m down the road on Thursday.
One creek in the zone has already been drained as detectives and RFS crews continue to search for William.
They're holding out hope his loved ones - and the public - will have closure by the end of the search.
But what initially was expected to take two to three weeks is looking more likely to drag on well beyond a month as detectives expand the scope of the search to a one square kilometre radius.
William Tyrrell (pictured) vanished from his foster grandmother's house in Kendall, on the NSW mid north coast in 2014 sparking an enduring police investigation
Last week, police revealed they were investigating whether William fell from the balcony at his foster grandmother's home to his death.
While the majority of the taskforce combed through bushland at the main search site on Batar Creek Road, a handful of officers were seen connecting a hose to the water tank.
It’s not clear if the tank was drained in the initial search for William when he disappeared seven years ago on September 12, 2014.
Within an hour, the dive crews had finished their inspection of the tank and left site.
The home, once owned by the young boy's foster grandmother, now belongs to a man who has nothing to do with the case.
Members of the police dive squad lowered a GoPro-style camera fitted to a pole into the tank to film what was inside
His foster grandmother's house (pictured) where William was said to have been
