Police are investigating a suspicious fire at a cell tower in Auckland after a video was posted online.
It appears the blaze was started as part of a conspiracy theory which claims a link between 5G and coronavirus.
The baseless theory has gone mainstream in recent weeks, leading to people around the world setting fire to phone towers.
Police say they believe the recent footage is related to an "apparent suspicious fire" in Manurewa on April 5.
The video shows a man pouring what looks like kerosene over cables at the base of a tower that is in construction.
"I'm going to send a message out," the person says, before setting it alight.
He then enters a car where an accomplice can be heard saying, f**k you 5G, "f**k you Government, f**k you new world order" before the pair drive off.
"Police treat the criminal damage of critical infrastructure, including cell phone equipment/towers, as a matter of high priority," a spokesperson told Newshub.
"Police are investigating this incident and we are working with the service providers involved.
"Anyone involved in such incidents can expect to be dealt with to the full extent of the criminal law."
Although there is no direct evidence, there are suspicions another fire at a cell tower may also be linked to anti-5G protesters.
Police confirmed they were treating a blaze at a cell tower on private land in the Far North on March 27 as suspicious, however another fire at a cell tower in Porirua on April 9 was determined to be caused by an electrical fault and "there were no suspicious circumstances around the fire", police said.
When asked about the movement last week, Prime Minister Jacinda Ardern condemned the conspiracy theory saying "that is not true".
"I can’t state it clearly enough. I almost hesitate to speak to it on this platform - it is just not true."
A number of cell towers have also been burned in the UK, with the country's Cabinet Officer Minister Michael Gove calling claims of links between 5G and COVID-19 "dangerous nonsense".
