Fire crews have been kept busy across the Upper North Island overnight

Twelve crews were called to a digger on fire in a building that stores palm kernel on State Highway 29 at Tauriko in Tauranga, just after 10.30pm.

Six trucks responded to a fire in an abandoned lodge on Taupo's Duncan Street just after 11pm.

Three crews then tackled a well involved house fire in Waikato's Waharoa about quarter past two this morning.

There were no reports of injuries at any of them -- and a fire investigator will head to the scene off all three later today.