Christopher Luxon's electorate office has a police presence after a reported bang was heard.

Christopher Luxon’s electorate office in Botany
Photo: Stuff/Ava Whitworth

Police are treating a fire at Prime Minister Christopher Luxon’s Auckland electorate office as suspicious.

The building was cordoned off just after 9.50 Wednesday morning after a person nearby reported hearing a loud bang at the building on Millhouse Drive in Botany.

Pharmacist at nearby Millhouse Pharmacy Phillip Kang said he heard the noise, which he initially thought may have been a car crash, and then emergency services arrived at the scene shortly after.

Police were guarding the scene, Kang said.

In a statement, police confirmed they were treating the fire as suspicious and investigations are ongoing.

A cordon has been established and a scene examination will take place.

A spokesperson for Luxon said: “There was a fire at the office. Our staff are safe and were not harmed.

“It is now a police matter so we do not have further comment at this stage.”

Christopher Luxon's electorate office has a police presence after a reported bang was heard.

Photo: Stuff/Ava Whitworth

Sign up for Ngā Pitopito Kōrero, a daily newsletter curated by our editors and delivered straight to your inbox every weekday.