More than a quarter of the victims in a cyberattack on the federal government - which lost data belonging to 21 million people - also had their fingerprints stolen, a federal agency said Wednesday.<br />The agency, a sort of human resources department for the federal government known as the Office of Personnel Management, initially said just 1.1 million sets of fingerprints had been stolen in the hack.<br />A statement released Wednesday said the agency was revising that number to 5.6 million.<br />The people in the hacked database included current and former federal employees, as well as people who had applied for background checks and their relatives.<br />While "federal experts believe that, as of now, the ability to misuse fingerprint data is limited," the agency said, "this probability could change over time as technology evolves."