Detective Senior Sergeant Kevin Ford said police had received a huge amount of support from the community since these two incidents.
"This is not something the majority of people in Wairoa want to see in their town and they are upset and concerned that police have been targeted in such a manner."
He said there will continue to be a heightened police presence to support the ongoing investigation and to help reassure the community.
"We are still seeking information from the public," he said.
"There will be people in Wairoa who have information about the two shootings and we encourage them to do the right thing and come forward."
Anyone with information that may help the police investigation is asked to call 105.
Information can also be shared anonymously via Crimestoppers on 0800 555 111.