A huge fire has raged through the night at a west London tower block, with eyewitnesses claiming people were trapped inside.
More than 200 firefighters are still tackling the blaze at Grenfell Tower in north Kensington, where hundreds of people are thought to live.
London Ambulance said 30 people are receiving hospital treatment.
The BBC’s Andy Moore said the whole 24-storey block had been alight and there were fears the building might collapse.
BBC correspondent Simon Lederman said he understood “a significant number of people” were unaccounted for.
At 6.15 BST, London Ambulance Service said 20 ambulance crews had been at the scene, 30 people had been taken to hospital, but the nature and level of their injuries was not yet clear.
Mayor of London Sadiq Khan said a “major incident” had been declared.
At about 04:00 BST police said: “Residents continue to be evacuated from the tower block.”
Eyewitnesses said they have seen lights – thought to be mobile phones or torches – flashing at the top of the block of flats.
Others say residents – thought to be trapped inside – were seen coming to their windows.
An unmanned hydraulic platform has been shooting water at the side of the building at about the 10th floor.