Anyone with information can contact police through the 105 service, quoting reference number P067894182. Information can also be provided anonymously through Crime Stoppers on 0800 555 111.
On Saturday, armed police were stationed outside the Māngere Community Health Centre on Waddon Place, while Harwell Place was cordoned off.
Hato Hone St John said it was notified of an incident at 12.33pm.
“Our ambulance staff treated two patients and transported them to hospital,” it said.
St John initially reported one person was in a critical condition and the other was in a moderate condition.
Two ambulances, two rapid response units and an operations manager attended.
Police blocked off the area as ambulance staff treated two injured people at the nearby Māngere Community Health Centre. Photo / Hayden Woodward
Forensic staff examined a property on Harwell Place.
Photos from the nearby health centre showed multiple armed officers and a black Subaru parked outside the clinic with a hole in its boot.
Police confirmed an injured man had been treated at the medical centre.
Five hours after the incident, officers remained in the area as they worked to establish what had happened and how the man came to be injured.