Police are asking the community to help locate a motor vehicle that was photographed near the Lindfield Park Road bushfire.
Police said they are asking to speak with anyone who may have seen the vehicle in the area or the current location of the vehicle.
A white Subaru Forrester was photographed near the ignition point of the fire near Lindfield Park Road on July 18, shortly before NSW Fire & Rescue were contacted.
The bushfire has been burning in underground peat for more than two months. Police believe the fire was deliberately lit.
Mid North Coast police are encouraging anyone with information about the current location of the car to contact Crime Stoppers on 1800 333 000 or the Port Macquarie Police Station on 6583 0199.
Rural Fire Service district officer Stuart Robb said the bushfire had now burnt more than 500 hectares.
"Obviously it has been going for 63 days and we've had boots on the ground for all of those days," he said.
"Some days there have been seven, eight or nine trucks out there and there is a significant number of hours being put into it on the ground or with support from aviation.
"It's frustrating if it was deliberately lit. That is a significant amount of resources which have gone into this fire.
"Significant cost to the public and smoke impacting on the residents of Port Macquarie."
Aircraft including helicopters and large air tankers have been used to flight surface fires in the area.
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