LONDON — The London police investigating the fire at Grenfell Tower that left at least 80 people dead have told survivors that there are “reasonable grounds to suspect” that the organizations managing the high rise might have committed corporate manslaughter.

The Metropolitan Police made the statement in a letter to the relatives of those who died and the families that escaped one of Britain’s deadliest fires, which broke out on June 14 in the 24-story tower in the North Kensington section of West London.

The letter was widely published in the British news media and on social media Thursday, but though a police spokesman would not confirm its contents, he said the families had been contacted. A police statement sent by email said, “This is a complex and far-reaching investigation that by its very nature will take a considerable time to complete.”

“We have updated families and survivors, which we consider a private update for them.”

It was not immediately clear when the letter was sent, but word of its existence came as the manager of the site where the charred remains of Grenfell Tower loom over the neighborhood told survivors that the building would be covered with a protective wrap next month before being taken down.