Cordons have been lifted at a rural township in Auckland's west after police descended en masse this morning.

Police say the incident has been resolved, but won't say what it was all about - but a person's assisting them in relation to the matter.

Residents on the Facebook community page Waitakere Township Grapevine earlier reported being told to stay inside and seeing more than 12 police cars and eight armed officers.

One said there had been reports that a truck driver had seen a person with a gun.

Police earlier confirmed they were "currently conducting an operation at an address in Waitākere".

"Bethells Rd is currently closed however local residents are being allowed access to their homes through the police cordon.

A staff member at Waitākere Primary School said there were armed police just down the road from the school near the corner of Bethells Rd and Wairere Rd.

They had heard police cars and a police helicopter circling above.

However, they had no idea what was happening.

"We have been trying to contact police as we have had so many parents ringing up. We haven't been told anything yet."

She had heard something might have happened around Duffy Rd.