The number of people whose fingerprints were stolen in a historic breach of federal files has skyrocketed — from just over 1 million to an estimated 5.6 million, according to the federal agency that was hacked. The Office of Personnel Management acknowledged Wednesday that the number of fingerprints stolen is far greater than initially thought. The information was part of an array of sensitive files, including Social Security numbers, swiped in a hack estimated to have affected 21.5 million people total — including people who applied for security clearances and their families.

In a statement, OPM said the agency, together with the Defense Department, discovered during their review that more fingerprints were taken. “The subset of individuals whose fingerprints have been stolen has increased from a total of approximately 1.1 million to approximately 5.6 million,” OPM said Wednesday. “This does not increase the overall estimate of 21.5 million individuals impacted by the incident. An interagency team will continue to analyze and refine the data as it prepares to mail notification letters to impacted individuals.” FULL REPORT