Around 200 people fled to safety after a fire broke out on the 27th floor of an iconic tower block in north-west London.
More than 50 firefighters tackled the blaze in Trellick Tower in Kensal Town on Wednesday night.
The London Fire Brigade said it received 40 calls to the fire on the 27th floor of the famous Brutalist building by about 9.20pm.
A woman and two children escaped the blaze unharmed before fire crews arrived at the scene, London Fire Brigade say.
In statement, the brigade said: “Eight fire engines and 58 firefighters and officers are tackling a flat blaze on Golborne Road in Kensal Town.
“The whole of a flat on the 27th floor is alight.
"The Brigade’s 999 control centre has taken over forty calls about the blaze.
“Fire crews from North Kensington and surrounding fire stations are at the scene.
"The cause of the fire is not known at this stage.”
Fire in Trellic Tower in London. Residents standing outside looking up at what was flames, now smoke. pic.twitter.com/YrPB0uI0lv— MicahLuxen (@MicahLuxen) April 19, 2017
A spokesman for the brigade later added: "In total, about 200 people were evacuated from the building."
The 31-storey high rise was designed in the famous Brutalist style by architect Erno Goldfinger.