Armed police hunting for a wanted person have raided a home near Ashburton this morning.

A police spokeswoman said the operation, which began around 10am, had finished.

Parts of the town of Tinwald were cordoned off as police searched a private property in Johnstone St.

It was not know if anyone had been arrested.

People posted on social media seeing a fleet of police cars including dog vehicles heading south from Rakaia towards the Canterbury township.

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A spokeswoman said the operation ended around 11.40am and armed police had since left the township.