Hackers have stolen personal information from millions more people than previously estimated in a massive attack on US government databases.<br /><br /> The Office of Personnel Management which handles human<br />resources says data has been stolen from 21.5 million people who have undergone background checks. <br /><br /> This includes their Social Security numbers.<br /><br /> That is in addition to data on over 4 million current and former federal workers stolen in what is being called a “separate but related” incident. Many people were affected by both hacks. <br /><br /> China has been widely seen as the prime suspect in the breach, which the US considers one of the most damaging on record. Beijing firmly denies any involvement.<br /><br /> OPM said in a statement that its investigation had found no information “at this time” to suggest any misuse or further dissemination of the information stolen from its systems.
