About 20 people were evacuated from their homes when a large fire broke out at a block of flats in north London.
The London Fire Brigade said 70 firefighters and 10 engines were sent to tackle the blaze on Acacia Road, Wood Green, on Wednesday night.
Flames spread to the roof of the four-storey building before the fire was brought under control shortly after midnight, the brigade said.
Three people were treated by paramedics at the scene, it added.
Footage posted online appeared to show flames emerging from the roof of the building, reported to be a council-owned block.
A number of those sharing images of the blaze said the fire had spread quickly from one of the maisonettes.