Fire crews were damping down hot spots last night following a major blaze at a farm building near North Walsham.
Neighbouring residents had been told to keep doors and windows shut as the workshop at Stow Heath Road, Felmingham contained asbestos.
Police re-opened the road just before 8pm after the area was declared safe.
The building next to Meadow's Barn has been severely damaged with burnt out machinery within the charred remains.
Norfolk Fire Service said several engines were sent to deal with the blaze at 11.30am. The blaze was bought under control within a few hours.
A spokesman said: 'A fire investigation is underway, but there is nothing at this stage to indicate this fire was started deliberately.'
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