A second ambulance was dispatched to the initial patient after the incident.
"The ambulance officers and the member of public in the other vehicle have been assessed at the scene by additional ambulance crews. Three ambulance officers have been transported to North Shore Hospital with moderate and minor injuries while the person in the other vehicle was assessed with minor injuries.
"St John takes the health and safety of our patients and ambulance officers very seriously and we are providing support to those involved.
"St John is investigating the incident and working with New Zealand Police."