He confirmed that "there is nothing to suggest at this time that the fire was started deliberately". Police barred their way and scuffles broke out. "Today we are holding assemblies for all our students to explain the support the school has made available for them and how they can access it".
A larger crowd of people remained outside.
"If they tell us that the cladding is the problem or how cladding is put on, or there might be some other issue that no-one has thought of yet, that is what will lead that investigation". We are aware that concerns have been raised historically by residents.
The death toll in the massive fire that engulfed a 24-storey tower here almost doubled to 30 today amid fears that it could climb to "triple figures", even as Scotland Yard launched a criminal investigation into the cause of one of the worst fire tragedies in the country.
"We know that at least 30 people have died as a result of this fire. Automatically everybody turns up because we are one family", Phupinder Singh, a volunteer said. Six victims have been identified and the others have been located, but with dozens of people still apparently unaccounted for speculation has increased that the number of dead could hit three figures. 24 people are still in hospital, 12 of them in critical care, according to the police.
"Once we get more information on what caused the fire to spread at Grenfell Tower, we will do further checks and provide further advice".
"Contractor says that he met all the fire safety standards but the questions are going to be, which kind of siding was used and what were the risks?" The exact cause of the fire is still unknown. "You get a lot of fragmentation of bodies, charring of bones and sometimes all that's left is ash", said Peter Vanezis, a professor of forensic medical sciences at Queen Mary University in London. The fire at Grenfell Tower burned at 1,000C.
Another complicating factor is that much of the DNA material that would normally be used to help pinpoint victims - such as toothbrushes or combs - were probably also incinerated in the blaze.More news: London tower block inferno: What we know
"We can't afford to wait many years for those answers", he said.
While the disaster has prompted an outpouring of generosity, there was also anger at politicians as the charred tower was cast as a deadly symbol of a divided society where the poor are neglected and the rich pampered.
"As well as sadness, there is a tremendous amount of anger and a vast number of questions", Al Jazeera's Neave Barker, reporting from London, said.
May has faced criticism for not meeting with survivors during her first visit to the site after the blaze, the wire service reports.
"She should have been there with the residents".
"She wanted an entirely controlled situation in which she didn't use her humanity", former cabinet minister Michael Portillo told the BBC.
Local people have contrasted the style of Mrs May's private visit with those of London mayor Sadiq Khan and Labour leader Jeremy Corbyn, who was seen with his arm round the shoulders of people affected by the disaster.
Meanwhile, experts have said sprinklers could have been fitted in the tower for £200,000, but Nick Paget-Brown, the Tory leader of Kensington and Chelsea Council, said there was not a "collective view" among residents in favour of installing them. But the government has been criticized for failing to act on recommendations from previous tower block fires.