In the wake of the mosque attacks, Christchurch's Anzac Day citizens' service began with a warning of safety.
Just under 500 people gathered for the service held at the Transitional Cathedral, also known as the cardboard cathedral, for the service at 10am.
Before the service commenced, the Dean of the Christchurch Cathedral, the Very Reverend Lawrence Kimberley, said in the case of an active shooter, people could hide in the offices lining the cathedral.
As part of the heightened security measures, bags were checked upon entry and police officers stood guard outside the entrance to the cathedral.
Indoors, several members of staff wore red sashes and stood at potential exits throughout the service.
"If someone comes into this place of worship, immediately decide the best way to protect your life," he said.
The Dean said while there was no specific threat to the Christchurch services, he "had to plan for them" in light of the Christchurch mosque attacks.