A spokesperson said: “Firefighters are currently at the scene of an ongoing fire on Dundas Street in Stromness, Orkney.
“Operations Control received reports of a large shed on fire at around 6pm tonight and mobilised three fire appliances to the scene.
“As a precaution, we are advising local residents in the affected area to keep windows and doors closed.”
It is understood the road has been closed and some residents have been evacuated from their homes.
Photos shared by BBC Radio Orkney show the extent of the fire, with flames billowing across the harbour.
Police Scotland and the Scottish Ambulance Service have been contacted for comment.
Our reporters are working to bring you the latest updates on this developing story.
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Large fire breaks out in Stromness as smoke billows across harbour
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