Ten fire engines and 72 firefighters and officers were called to a fire at Stables Market on Chalk Farm Road in Camden.
A number of railway arches used as shops were damaged by the blaze. Around 600 people were evacuated from the area before the Brigade arrived.
Borough Commander Richard Welch, who is at the scene said:
“When firefighters arrived they were faced with a fire in a range of shops under railway arches and the smoke could be seen from miles around. Firefighters worked hard to bring the blaze under control and stop it spreading further.”
The Brigade was called at 1957 and the fire was under control at 2250. Fire crews from Kentish Town, Euston, West Hampstead, Lambeth, Holloway, Islington and Soho fire stations attended the incident.. The cause of the fire is under investigation at this stage.