"Police are aware of the planned protests and, as with any such activity, will respond to any issues as and when required," a spokesperson said.
"We would remind people of the alert level 4 restrictions, which remain in place and require people to stay home, except for essential travel to buy food or for medical reasons."
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In posts on social media, 5G protesters were told to wear protective gear, masks and gloves.
They were told to leave children at home and stand at least two metres apart from one another while protesting.
As of Tuesday, nearly 300 people had been caught breaking rules since the lockdown began. Most received a warning.
However, police told the Herald they had taken action against 16 people who were facing prosecution for not adhering to the lockdown rules.
Of the 291 breaches recorded by police as of Tuesday, 263 had been warned and 12 received a youth referral.
Strict quarantine for all arrivals at the border would be in place indefinitely and remained a key measure in what the Prime Minister is calling the "marathon" fight to eliminate Covid-19.
Ardern yesterday urged New Zealanders to remain vigilant and lockdown-compliant as they headed into Easter, warning not to let up in light of yesterday's 29 new cases - the lowest since March 21.