Big bang mystery
A sound similar to a ‘‘huge explosion’’ was heard by Onehunga and Mangere Bridge residents on June 14. Counties Manukau police spokeswoman Kimberley Mathews says the noise heard in the evening was not related to any police matter. Mangere Bridge resident Carol-Anne Armitage believes the noise might be coming from the Manukau Harbour, where Watercare is doing geotechnical investigations for the Central Interceptor project. Watercare is drilling boreholes near Manukau Yacht and Motor Boat Club in Mangere Bridge. But a spokesperson from Watercare says the noise was not related to the work. Inquiries with police, the Onehunga Port, power companies and Geonet have not revealed the source or direction of the noise.