ATLANTA — The U.S. company that manufactured the panels on a London apartment tower where at least 80 people died in an inferno has quit selling them for high-rises because it has no control over their installation, a top company executive said Monday.

Arconic Inc. is continuing to work with investigators to determine what caused the flames to spread so rapidly at Grenfell Tower on June 14, interim CEO David Hess told investors during an earnings call.

“Cladding systems contain various components selected and put together by architects, contractors, fabricators and building owners, and those parties are responsible for ensuring that the cladding systems are compliant under the appropriate codes and regulations,” the company said in a prepared statement Monday.

About 12 days after the blaze, the company announced it would discontinue making its Reynobond PE panels available for high-rises. That decision was made out of “an abundance of caution as Arconic does not control the ultimate design and installation of the final cladding system,” the company said.

“We extend our deepest sympathies to those who have lost so much,” Hess said Monday.

An Associated Press review this month found that some building owners in the U.S. were unaware that the same Reynobond panels, which feature a polyethylene core, were used on their buildings as well. Polyethylene is combustible, according to federal agencies, including the Centers for Disease Control and Prevention.

In many cases, building owners and regulators did not know the product was used on their structures, or exactly how it was applied. In several cases, old building records had been destroyed.

No one has declared any U.S. buildings unsafe, nor has the U.S. government ordered widespread testing of building panels that British authorities ordered after the London catastrophe.

Meanwhile, at least three federal lawsuits seeking class-action status this month accuse Arconic of knowingly failing to disclose the dangers of Reynobond PE.

“Despite the known flammability of the Reynobond PE panels, resulting in prohibitions against installing them in high-rises in the U.S. and Europe, Arconic sold millions of dollars of the flammable panels for use in projects Arconic knew were inappropriate and presented a fire hazard,” lawyers for Janet L. Sullivan wrote in a lawsuit filed in New York’s southern district.

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