Grenfell Tower is reported to contain 120 flats
Several people have died and more than 50 people are in hospital after a huge fire engulfed a west London tower block on Tuesday night.
The building is still on fire and there are fears it may collapse.
The fire was reported at the 24 storey block, Grenfell Tower, in north Kensington, 00:54 BST.
It is believed to have started on the fourth floor and spread incredibly quickly.
Forty fire engines and around 200 firefighters went to tackle the blaze.
How many victims are there?
London Fire Commissioner Dany Cotton said there had been "a number of fatalities" but she could not say how many because of the "size and complexity" of the building.
More than 50 people are being treated in hospital, according to the London Ambulance Service.
Footage shows the extent of damage
Eyewitnesses have said some people may still be trapped in the building.
The tower block contains about 120 flats and there would have been "several hundred" people in the block when the fire broke out, according to the leader of Kensington and Chelsea Borough, Nick Paget-Brown.
The Met Police has set up an emergency number on 0800 0961 233 for anyone concerned about friends or family.
People who live in the block, but have left, are being urged to make themselves known to the authorities so that they know they are safe.
What caused the fire?
It is not yet known what caused the fire.
Where is the tower block?
Grenfell Tower is on Latimer Road, in west London.
It’s part of the Lancaster West Estate, a social housing complex of nearly 1,000 homes, in the borough of Kensington and Chelsea.
The tower block is near Westfield shopping centre in White City and the A40 – a major route for traffic entering and leaving the west of London.
What do we know about Grenfell Tower?
Grenfell Tower was built in 1974 by Kensington and Chelsea Borough Council.
A two-year £10m refurbishment – which was part of a wider transformation of the estate – was completed last year. Work included new exterior cladding and a communal heating system.
The tower is managed by the Kensington and Chelsea Tenant Management Organisation (KCTMO) on behalf of the council.
Grenfell Tower, North Kensington
20 residential levels
4 community/podium levels
2016 tower block refurbishment completed
The local Grenfell Action Group had claimed, before and during the refurbishment, the block constituted a fire risk and residents had warned that access to the site for emergency vehicles was "severely restricted".
The BBC has been unable to contact the property’s management company in the hours since the fire.
What are eyewitnesses saying?
Eyewitnesses said they saw people trapped inside the burning building screaming for help, and shouting for their children to be saved.
Some said they saw lights – thought to be mobile phones or torches – flashing at the top of the block of flats, and trapped residents coming to their windows – some holding children.
Eyewitness Jody Martin said: "I watched one person falling out, I watched another woman holding her baby out the window… hearing screams.
"I was yelling at everyone to get down and they were saying ‘We can’t leave our apartments, the smoke is too bad on the corridors.’"
Resident: ‘It was like a horror movie’
Paul Munakr, who lives on the seventh floor, managed to escape, but said he was alerted to the fire not by fire alarms but by people on the street below, shouting "don’t jump, don’t jump".
Michael Paramaseevan, who lives on the seventh floor with his girlfriend and young daughter, said he ignored official advice to stay in your home.
"If we had stayed in that flat, we would’ve perished. My gut instinct told me just to get the girls out. I wrapped the little one up because of the smoke and I just got them out."
David Benjamin says he was woken by a neighbour banging on the door
Another resident, Zoe, who lives on the fourth floor, said she was woken by a neighbour banging on her door.
"The whole landing was thick with smoke. The smoke alarms weren’t going off but the way it spread so quickly from the fourth floor, all the way up to the 23rd floor was scary."
The BBC’s Andy Moore, who was at the scene, described watching debris falling from the building, and hearing explosions and breaking glass.
"The police keep pushing back their cordons, pushing back members of the public for fear the building might collapse," he said.
What other disruption is there?
The A40 – part of which is known as Westway – is closed between Northern Roundabout and Marylebone Road.
London Underground has closed the Circle line and the Hammersmith & City line between Hammersmith and Edgware Road.
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