Six fire engines and 35 firefighters and officers were called to a fire at a car and recycling scrapyard in Lochnagar Street in Poplar.
An area of recyclable materials was destroyed by fire. One propane cylinder was cooled to an ambient temperature.
The Brigade was called at 1510 and the fire was under control at 1732. Fire crews from Poplar, Homerton, Millwall, Dockhead and Stratford fire stations attended the scene.
The cause of the fire is under investigation.