The aluminium cladding, called Reynobond, was made by United States company Arconic and had a polyethylene core, which the reports said was slightly cheaper than fire-resistant models by the same manufacturer.
It was the latest expression of anger in the community following the fire that raged through Grenfell Tower where the death toll could exceed more than 100.
At least 500 people lived in the 120-flat building, but it is not clear how many were in the tower block at the time of the blaze.
He said police had started a criminal investigation but there was nothing to suggest "that the fire had been started deliberately".
Families searching for information about their loved ones have, meanwhile, blanketed the area near the tower with posters searching for answers.
Choucair told Reuters residents had concerns about the safety of the building and she was angry about what has happened.
Prime Minister Theresa May, who has faced criticism for failing to meet survivors when she visited the scene on Thursday, has ordered a full public inquiry into the disaster in response to mounting anger that the fire might have been preventable.
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Geddo said those who attempted to leave the city were being shot by snipers deliberately aiming at people trying to flee. Geddo said the UNHCR opened its 13th camp two weeks ago to accommodate the growing numbers of people fleeing Mosul.
"Meet the victims!" one person yelled as Leadsom was interviewed on Sky News.
Cundy noted that the ongoing operation to recover and identify all victims is a complex process, and some may never be identified.
Yesterday, London mayor Sadiq Khan was heckled by a small boy as he endured a bruising visit to the community - confronted with questions "how many children died?"
In addition to debate over the cladding, questions have also been raised over why there was no sprinkler system in Grenfell Tower which could have helped stop the fire spreading, or any central smoke alarm system that would have woken sleeping residents.
There has been growing fury on the low-rent estate where residents wanted answers on why the fire was able to spread so rapidly and why complaints about safety had been ignored.
Stuart Cundy said that "we believe this number will sadly increase".
May made a private visit to the Chelsea and Westminster Hospital which is treating eight survivors on Friday afternoon, after being heavily criticized for attending the site but not meeting the Tower block's residents.
The family of missing girl Jessica Urbano said they had not heard from her since a phone conversation at 1:39am on Wednesday, after the fire took hold.