A fire crew has remained on watch at the site of a sawmill fire south of Rotorua.
The blaze broke out in a mill building on Mangamingi Rd near Reporoa about 9pm last night.
Thirteen fire crews and water tankers were called to put the fire out.
The biggest structure ablaze was understood to be 40m by 5m.
Fire and Emergency has kept one crew on standby in case of flare-ups during the night.