Fire crews tackled a blaze in machinery at a structural engineering firm in Lancing last night.
The fire caused minor damage at Graham Wood Ltd in Chartwell Road at about 5.45pm.
A West Sussex fire brigade spokesman said: "The fire involved a dust extraction unit. The filters from the unit were removed to the open air."
Two fire crews from Lancing and one from Shoreham spent 30 minutes putting out the fire.
The cause of the blaze is being investigated.
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