About 100 firefighters battled the Saturday night inferno, which saw flames shooting 30ft into the air. The flames took three hours to get under control. There are no reports of any injuries.Police chief superintendent Dominic Clout said: "It is far too early at the moment to say whether the cause of the fire is suspicious or otherwise. The fire brigade cannot confirm where the seat of the fire is."
Police say parts of Camden Town in north London will be closed for the next three or four days.
