PORT Stephens detectives are interviewing an 11-year-old boy over the fire which burnt out more than 5000 hectares.
The Hank Street fire caused widespread emergency evacuations last Thursday, closed Newcastle Airport for almost a full day, destroyed several sheds and caused widespread traffic chaos as it jumped containment lines and roared towards Williamtown.
It started at Heatherbrae several days beforehand.
Detectives arrested the boy on Monday morning and are expected to charge him with intentionally causing a fire and being reckless about its spread.
Boy in court over fire
A BOY, 14, has been refused bail after being charged with lighting a fire at Rutherford.
Fire crews were called to an area of scrub off the New England Highway after it was set alight on Sunday afternoon.
He will face Broadmeadow Childrens Court on Monday.