China hacks U.S. Government computer networks and personnel office and stealing identifying information of at least 4 million federal workers, American officials said Thursday.
The Department of Homeland Security said in a statement that data from the Office of Personnel Management and the Interior Department had been compromised.
4 million current and former federal employees may have had their personal information hacked.
The agency, which conducts background checks, warned it was urging potential victims to monitor their financial statements and obtain new credit reports.
U.S. officials believe this could be the biggest breach ever of the government's computer networks.