UPDATE: STRIKE FORCE SET UP AS SNIFFER DOGS FAIL TO PICK UP SCENT OF WILLIAM TYRELL

Police Strike Force Rosann has been established as sniffer dogs fail to pick up any scent of William Tyrell, five days after he went missing on the NSW mid north coast.
The 3-year-old boy was last seen playing with his sister in his grandmother’s Kendall frontyard on Friday morning.
Searchers combed bushland again throughout last night in a 1.5 kilometre radius from the home and have expanded the search out to three kilometres today.
Superintendent Paul Fehon says neither police sniffer dogs nor cadaver dogs have been able to pick up any sign of the boy, fuelling fears he may not have wandered away from home.
Police are been working with specialist units across the state, including the sex crime squad.
Known sex offenders in the area have been contacted to confirm their whereabouts when William was last seen.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000.