A new clue has been extracted during a woodland search for William Tyrrell on the New South Wales Mid North Coast.
Police today photographed and bagged a black piece of fabric located in the same area where two pieces of red string were unearthed just days ago.
The new piece of evidence has been sent away for testing.
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On Friday an eight-by-eight centimetre piece of faded blue fabric was found near the creek in Kendall.
The fabric was also marked, photographed and bagged for forensic testing.
William was three when he disappeared from the Kendall home on September 12, 2014.
The new searches were launched this week, with police confirming they were looking for William's remains.
The extensive search has brought in several experts including an archaeologist, forensic anthropologist and a water expert.
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There was a weather warning for heavy rain today, with up to 80 millimetres expected to hit the search area.
More rain is expected Sunday night and on Monday as the search enters a second week.
Detectives continue to investigate the theory William fell from a balcony at the home where he was last seen.
A car that formerly belonged to William's now-deceased foster grandmother was also seized and is undergoing forensic testing.
William's foster mother is being treated as a person of interest in the case.
She has not been arrested or charged.
