Police are investigating after a machinery shed was destroyed by a suspicious fire in Salisbury, northwest of Dungog.
Emergency services were called to Salisbury Road at about 2:20am on Sunday morning, following reports of a blaze.
The flames were contained, but not before the building and its contents were burnt to the ground.
The machinery and vehicles inside the shed were decimated in the inferno, which detectives believe may have been deliberately lit.
No one was injured.