Police are understood to be engaged in a stand-off after a "family-harm related incident" in Port Waikato.
Police first responded to an address on Maunsell Road shortly before 9am on Thursday.
A Police spokesperson said there are "concerns for a person's wellbeing".
When asked if there was a standoff they said, "that appears to be the case".
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The Police Eagle Helicopter has been flying above the property.
No injuries have been reported and there is no immediate risk to the public, the spokesperson confirmed.