"The fires are being treated as suspicious and inquiries are under way into these incidents," Vickers said.
Anyone with information about the incidents or who saw suspicious activity at any of these locations is asked to contact Counties Manukau Police on 105 or Crimestoppers anonymously on 0800 555 111.
The fires are the latest of at least 18 suspicious cell tower fires, thought to be linked to conspiracy theories related to the rollout of 5G.