More than 70 firefighters are tackling a blaze at an industrial bakery in Tottenham.
London Fire Brigade sent 10 fire engines to the fire at a single-storey unit in West Road at 6.20pm.
Firefighters don't believe anyone was inside the building and a spokesman said no-one has been injured.
Pictures from the scene show plumes of thick smoke billowing into the air.
Fire crews are currently using covering jets to prevent the fire from spreading to neighbouring units.
Police have closed roads in the area and people living near the fire have been advised to keep their windows closed as a precaution against the smoke.
The cause of the fire is currently unknown.
Firefighters are likely to remain on the scene throughout the night.
