A suspicious fire was started at the old Pahiatua saleyards on Princess St early Sunday.
The Pahiatua Volunteer Fire Brigade was called to put out a blaze in an empty building on the yard site at 2.44am.
Officer in charge Bryce O'Donnell said the building was made of thick material, which prevented the fire from taking hold.
It had been burning for a while but there wasn't much damage except to the doorframe.
"It was only a very small fire, nothing too major," Mr O'Donnell said.