WASHINGTON (Reuters) - The U.S. Office of Personnel Management (OPM) said on Thursday that hackers had stolen sensitive information, including social security numbers, of about 21.5 million people from background investigation databases.
The 21.5 million included 19.7 million individuals who applied for security clearances, plus 1.8 million non-applicants, including mostly spouses or co-habitants of applicants, OPM said.
The 21.5 million affected is in addition to information about 4.2 million current and former federal workers stolen in a "separate, but related" incident. There is significant overlap between the two groups.
(Reporting by Patricia Zengerle; Editing by Sandra Maler)