Spotters watched over Thursday's Anzac service at the Auckland Domain attended by Prince William, ready to stop any potential attacks.
The country has been on high alert since March's terror attack in Christchurch, the worst in New Zealand history. Last week the Government dropped the terror threat level from high to 'medium', but that still means an attack is "assessed as feasible and could well occur".
There have been threats made against Anzac services, after suggestions an Islamic prayer could be included to mark the victims of the Christchurch attack, who were all Muslim.
A number of services in Auckland were cancelled or consolidated so police could provide effective coverage.
Prince William was in Auckland on Thursday, and attended the 11am ceremony. He appeared alongside Prime Minister Jacinda Ardern and didn't speak at the event.
Police declined to comment on security at the event, citing "operational reasons".
Elite police from Australia helped protect the public during the remembrance services for those killed in the Christchurch attack.
William was scheduled to leave Auckland after the service, and head for Christchurch.