A large fire has spread to a number of warehouse units on a north-west London industrial estate.
About 120 firefighters and 20 engines are on the scene at Long Drive, Northolt, London Fire Brigade said.
The brigade said a third of the building was alight and nearby residents should keep windows closed due to thick smoke.
Station manager Ben King said it was a “very visible fire” and the crews would be tackling it “for a number of hours”.
Long Drive is closed in both directions due to the fire, as are Chartwell Close and Norwich Road.
The cause of the fire is not yet known.