Several carvings were damaged in a blaze at the Waikato Museum in Hamilton.
Northern shift communications manager Michael Upton said firefighters were alerted to the blaze on Grantham St about 8pm.
Seven appliances were sent to the job, and a specialist fire investigator had also been called in, he said.
"There's been some damage to some carvings in the museum down near where the waka is on the lower ground floor."
Museum staff were currently on site assessing the damage, and the specialist fire investigator would look into the cause of the blaze, Mr Upton said.