Firefighters and police were called on Thursday evening to the Auckland home where health chief Pauline Hanna was found dead last month.
Hanna's death at her Remuera home remains "unexplained".
Two fire trucks were called to the scene just before 6pm. Police confirmed they attended the scene after reports of a fire.
A Fire and Emergency shift manager confirmed it was not a house fire but a "small gas bottle on fire outside the house".