Washington (CNN)-Four million current and former federal employees, from nearly every government agency, might have had their personal information stolen by Chinese hackers, U.S. investigators said.
U.S. officials believe this could be the biggest breach ever of the government’s computer networks. China called the allegation irresponsible.
The Office of Personnel Management, which is conducting background checks, warned it was urging potential victims to monitor their financial statements and get new credit reports.
The breach was initially thought to have impacted the Office of Personnel Management and the Department of Interior, But government officials said nearly every federal government agency was hit by the hackers.
An assessment continues, and it is possible millions more government employees may be affected.