The new exterior cladding used in a renovation on London's Grenfell Tower, reports the Associated Press, may have been banned under U.K. building regulations, two British ministers said Sunday as police continued their criminal investigation into the inferno that killed at least 58 people.

Trade Minister Greg Hands said the government is carrying out an "urgent inspection" of the roughly 2,500 similar tower blocks across Britain to assess their safety, while an opposition lawmaker urged the government to quickly secure documents in the Grenfell renovation for the criminal probe.

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