Around 100 firefighters were called to the scene of a blaze at a block of flats in north London.
The London Fire Brigade said it sent 15 fire engines to the Grange Estate in East Finchley after the alarm was raised just after midnight.
Part of the roof of the three-storey building was ablaze when crews arrived.
🚧 LIVE INCIDENT 🚧— Barnet MPS | North West BCU (@MPSBarnet) November 7, 2018
Officers have been called to assist @LondonFire to the Grange Estate #N2 to a large building Fire
Road Closure in place A1000 HIGH ROAD j/w Oak Lane to Viaduct Road pic.twitter.com/DBOklKOAmL
Video posted on social media showed firefighters running toward the building as flames leapt into the sky.
The Metropolitan Police said it had assisted the LFB after it was called to the scene at 1.30am.
Around 60 people had left the building before emergency services arrived.
Fifteen fire engines and around 100 firefighters are now at the scene of the #EastFinchley fire. Crews are tackling a blaze in the roof of the three-storey building https://t.co/AzXpUUeJDK pic.twitter.com/fgcHeXRH98— London Fire Brigade (@LondonFire) November 7, 2018
The LFB said the fire had been brought under control by 2.05am on Wednesday morning and there were no reports of injuries.
Station Manager Peter Gustafson said: “When crews arrived they were faced with a well developed fire in the roof space of the building.”