London (CNN)British police say they have found the "last visible" human remains from inside Grenfell Tower, the 24-story building that was the site of last month's raging fire.
At least 80 people were killed in the June 14 disaster but police say only 21 of those have been formally identified.
Commander Stuart Cundy told reporters on Wednesday that police had "forensically recovered the last of the visible human remains."
Tower fire leaves lasting scars 05:25
"Work in Grenfell Tower continues, seven days a week," Cundy said. "I do not want there to by any hidden victims of this tragedy."
Cundy said that although police had made 87 recoveries, the "catastrophic damage" inside the building means they do not equate to 87 people.
Photos: Fire engulfs West London apartment block
Burning debris falls from Grenfell Tower as a massive fire engulfs the London apartment building early on June 14, 2017. Seventy-two people are confirmed to have died in the fire.
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Smoke rises from Grenfell Tower hours after the fire.
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A woman cries as she tries to locate a missing relative.
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A woman runs near paramedics working near the fire.
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Witnesses reported terrifying accounts of people trapped in the tower. Some people were reported to have jumped from the tower.
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People watch as Grenfell Tower is engulfed by fire.
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Emergency service members work at the scene.
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Residents of nearby Whitchurch Road watch smoke streaming from the tower.
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Emergency personnel prepare in an open area near the blaze.
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People watch as smoke rises from the tower.
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Michael Paramasivan and his daughter Thea Kavanagh managed to escape the fire.
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Police officers asked people to step back so they could expand the cordon and make more space for emergency services.
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Police stand near debris from the fire.
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A security cordon holds people back as Grenfell Tower burns.
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Children wear masks that were distributed near the site of the fire.
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The building, built in the 1970s, was home to 125 families.
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Emergency services respond to the fire.
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Firefighters battle the massive blaze.
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Smoke could be seen billowing over the heads of residents who gathered in nearby streets to watch the blaze.
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Residents from nearby Barandon Walk wait outside their building. The building was evacuated around 2 a.m. Police told residents that heat emanating from the fire could affect the structure of their building.
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Witness Michael Kyriakou told CNN the fire spread quickly, with one side of the building ablaze around 15 minutes after it started. "Within an hour it had engulfed the top part of the building," he said. "There are people in bathrobes and slippers all around us, so hopefully as many as possible got out."
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Police have spoken to at least one person each from 106 of the 129 apartments in the tower. Based on those conversations, they believe there are 18 people who must be presumed dead.
That leaves 23 apartments with no-one accounted for. "We assume that sadly no one from any of those flats survived," he said.
Cundy added that specialist officers have started a search by hand that will involve going through 15.5 tons of debris on each floor to find remains still in the tower.
Task force
The announcement comes on the day the British government appointed a task force to take over parts of the Kensington and Chelsea local council in response to its admitted failings in the wake of the tragedy.
London defiant after month of turmoil 09:43
There has been widespread criticism of the council's lack of ability to deal with the situation, with leading figures resigning from their posts.
"The scale of the recovery effort needed on the Lancaster West estate in the months to come cannot be underestimated," Communities Secretary Sajid Javid said Wednesday.
"I want to help the council meet that challenge," he added.
"As well as providing that immediate support, we must have an eye to the future. This intervention is putting in place the foundations that will support the longer term recovery," he said.
