William Tyrrell search wraps up

A fresh search for missing three-year-old William Tyrrell on NSW's mid-north coast has proved fruitless.

Up to 30 officers scoured difficult terrain about 20 kilometres from where William was last seen outside his grandmother's home in Kendall in September.

Police divers joined the effort, scouring a murky swamp and dam nestled in the bushland before the search was brought to an end on Wednesday afternoon.