Walkway entrances into the park – which is next to Te Irirangi Drive – were temporarily cordoned off while police worked in the area.
A Hato Hone St John spokesperson said an ambulance also attended.
A Herald photographer at the scene yesterday said police search and rescue staff, wearing PPE and waders, were preparing to deploy an inflatable boat into the pond within the reserve.
Cordons were established at Rongomai Park in Flat Bush while police carried out a body recovery mission. Photo / Hayden Woodward.
A specialist police photographer was also seen at the reserve, while several police vehicles remained on nearby Belinda Ave.