Fire crews in Havelock North are battling a "well-involved" fire at a restaurant.
It's understood the fire is at Black Barn Vineyards and Restaurant on the outskirts of Havelock North.
Central Fire and Emergency NZ shift manager Carlos Dempsey said they received multiple calls about the fire at 9.15pm.
"Crews arrived to find a well-involved fire in a restaurant," he said.
Additional help was sent from Napier.
Just after 10.50pm, Dempsey said the fire was under control, and a specialist fire investigator will head to the scene to investigate.
He said six fire appliances and several support vehicles attended the blaze.
Dempsey said the building was "quite damaged" and there was no reports of any injuries.
The annual event means closures for some lanes on the city's harbour bridge.