After visiting the site of the devastating fire in a 24-storey tower building in London, May said on Thursday that she wanted to make sure the awful tragedy is properly investigated.
Though 30 people have been confirmed dead so far, the death toll is expected to rise as the building held hundreds of people and many were trapped in their homes during the fire.
Six Egyptians remain missing after a fire engulfed the Grenfell Tower in London.More news: Mercedes' Lewis Hamilton nips Vettel for pole position at Canadian Grand Prix
Similar demonstrations are being held across the United Kingdom and Ireland in answer to a call from the residents in Grenfell urging people to help demand justice for the victims who perished in the fire, their families and all those affected.
"They are simply not recognisable because of the fire", Fiona McCormack, from the Metropolitan Police's identification team, said of the victims found inside Grenfell Tower.
The incident has brought to light a number of concerns residents had with the safety standards of the building.
London police said an investigation, led by a detective from its homicide and major crime unit, would examine whether criminal offences had been committed although they said there was nothing to suggest the fire was started deliberately.
The devastating fire at London's Grenfell Tower has now claimed 30 lives, according to police.More news: Turkey lawmakers back sending troops to Qatar base
In support centres and at the scene of the fire, the anger and frustration of residents began to bubble over. One day on, details are slowly emerging - here's everything we know so far.
We plan to house residents of Grenfell Tower as locally as we can.
May's response has been contrasted with that of Corbyn, who hugged locals at the estate during his visit on Thursday, and the royals who met residents and volunteers earlier today.
Speaking to the cameras, he praised the local community spirit, to which one woman shouted: "We can't say the same for the authorities". The Independent reports that Saye posted to Facebook at 3 am Wednesday that she and her mother were trapped in their apartment, and asked people to pray for them. "She was very, very loved by a lot of people", she said.
Construction firm Rydon, which carried out the refurbishment, initially said in a statement that the work met "all fire regulations" - the wording was omitted in a later statement.More news: Andy Murray wary of Karen Khachanov test
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