U.S. Weighs Extent of Suspected Data Breach by Hackers in China

Government officials were scrambling Friday to gauge the extent of information gained in a suspected hacking of millions of government workers’ personnel files, including whether sensitive security data was compromised.

“I don’t think we can tell you with a whole lot of detail precisely what was taken,” White House spokesman Josh Earnest said, adding the breach may have resulted in a “substantial amount’’ of data stolen from government computers.