Firefighters have issued a reminder of their smoking safety advice following a fire at a block of flats on Elsa Street in Shadwell.
The fire affected two flats and an external shed, which was destroyed by the fire. There are no reports of any injuries.
The fire is believed to have been accidental and was caused by the unsafe disposal of smoking materials.
A London Fire Brigade spokesperson said: "If you smoke it is vitally important you stub it right out, preferably in an ashtray.
"Always ensure your cigarette is completely out when you’ve finished smoking it. If you don’t, you risk causing a fire.
"Firefighters recommend that you have a look at our online Home Fire Safety Checker to make sure there are no hidden hazards in your home.
"The online tool will ask you a series of questions that will help us work out the level of risk in your home, or the home of someone you care for. It only takes a few minutes to get tailored advice to keep yourself and loved ones safe from fire.”
Control Officers took the first of 21 calls at 0331 and mobilised crews from Bethnal Green, Shadwell, Whitechapel and Poplar. The fire was extinguished by 0517.