Police are at the scene of an early morning house fire that multiple fire crews battled to contain.

Fire and emergency South Island shift manager Simon Lyford confirmed crew were sent to a well involved house fire on Arthur St at 3.45am on Thursday.

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"We responded with crews from Timaru and Washdyke. When they arrived the single storey house was well involved."

A second alarm was raised and further crew from Timaru and Temuka arrived,