Fire and Emergency New Zealand declined to comment on the matter and referred the Otago Daily Times to New Zealand Police.
A police spokesman said officers were called to assist Fenz at 6.40pm, following reports of smoke coming from windows at an Irving St house.
However, he said police were not sure if it was caused by fire.
‘‘Police are now working to establish the circumstances around the incident.’’
No injuries have been reported although a St John an ambulance was in attendance.
A Fire and Emergency New Zealand spokesman confirmed a Hazmat Unit was dispatched from Invercargill to help with the incident.
The unit deals with hazardous substances.