Fourth alarm shed fire in Trentham, Upper Hutt

The shed fire in Trentham, Lower Hutt. Photo / Supplied

A shed fire has broken out in Trentham, Upper Hutt, and elevated to a fourth alarm.

Emergency services were called to the blaze at a storage shed at 6.50pm and nearly two hours later 12 fire engines were being used to battle the blaze.

A Fire and Emergency New Zealand spokesman said the building was "well alight" when firefighters arrived.

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A police spokeswoman said police were called to assist and officers had helped with traffic control.

Emergency services were called to the blaze at 6.50pm. Image / Google

Police were making initial inquiries to determine whether or not the fire was suspicious, she said.