NSW Police say they are "looking for the remains" of missing boy William Tyrrell in a series of new searches announced on Monday.
William vanished seven years ago from his foster grandmother's house at Kendall on the state’s Mid-North Coast.
Dressed in a Spider-Man suit, the three-year-old was last seen playing in the front yard of the Benaroon Drive property on September 12, 2014.
It is expected the “high-intensity” searches will involve hundreds of officers and last several weeks.
Detective Chief Superintendent Darren Bennett said officers would be "looking for the remains of William Tyrrell".
"It's highly likely that if we found something it would be a body. We are looking for the remains of William Tyrrell, no doubt about that," he said.
"This activity is in response to evidence we have obtained in the course of the investigation, not speculative in any way, we are acting on behalf of the coroner."
Police said the search would involve three specific locations, all in the Kendall area.
Detective Chief Superintendent Bennett said the searches were based on new evidence and experts from outside the police force would be assisting officers.
"There will be a number of strategies used by the police and other agencies to clear ground and go subterranean in the number of locations," he said.
Police hope the new search will bring the investigation "to a conclusion" after an 18 month inquest finished in 2020.
"I would also like to remind everyone from the public there is still a $1 million reward for information leading to the conviction of a person with regard to this," Detective Chief Superintendent Bennett said.
Deputy state coroner Harriet Grahame concluded an inquest into William's disappearance in October last year but has yet to publish her findings.
Police said Ms Grahame was fully aware of the new searches and would be kept up to date on any findings.
The inquest heard that William Tyrrell was taken from his birth parents nine months after he was born on June 26, 2011, because of a history of substance abuse and domestic violence.
However, regular contact with his birth parents continued.
His disappearance crushed the worlds of William's two families, his birth and foster carers, the inquest was told.
Detective Gary Jubelin led the investigation for four years before he was convicted for illegally recording four conversations with a former suspect.
