Search for missing boy in Spider-Man suit continues

Additional search teams are being sent from Sydney to help find a little boy who went missing from his grandparents' backyard on Friday.

There is still no sign of William Tyrell, 3, as the desperate search continues today on the NSW mid-north coast.

The search is entering its fourth day, after William disappeared on Friday morning, while playing in his grandmother's back yard at Kendall.

Search crews worked through the night - and they are now very concerned.


"As time goes on, obviously the survival diminishes," Superintendent Paul Fehon said.

"I think it's fair to say we would have liked to have located something at this stage."

The area where police, SES, members of the Rural Fire Service, local surf lifesaving club and several hundred community volunteers are looking for William was expanded on Sunday.

Authorities have been combing bushland for the past few days and on Saturday evening police divers began searching surrounding dams for the boy, who was last seen wearing a Spider-Man costume.

The search will continue throughout Sunday night, following what local police inspector Kim Fehon described as a "critical day," given William had likely gone without food and water for several days.

"I have briefed all the search teams that they are looking for a small boy who is likely to be curled up and may be covered and have found somewhere to hide," she told Fairfax.

"At this time we are hoping he is still in a position to respond to being called out to."

Jenny Atkins, a senior instructor at the Camden Haven Pony Club who's joined the search, said the volunteer's mood was "pretty down" and "worried".

"We've had riders going out helping on horse back looking through the thick scrub," she told AAP.

There is still no sign of missing little boy William Tyrell, 3, as a desperate search continues today on the New South Wales mid-north coast. Photo: Supplied


"It's rough country, they come back with leeches," she said.

Since the search began the close-knit community has rallied around William's grandmother, Ms Atkins said.

"Everyone's feeling for her," she said.

"Our community does support each other, we're very rural."

William has been described as being of Caucasian appearance, with dark hair and hazel eyes.

A police spokeswoman said there weren't any plans to wind the search back.