The State Department has taken the unprecedented step of shutting down its entire unclassified email system as technicians repair possible damage from a suspected hacker attack.
A senior department official said Sunday that “activity of concern” was detected in the system around the same time as a previously reported incident that targeted the White House computer network.
That incident was made public in late October, but there was no indication then that the State Department had been affected. Since then, a number of agencies, including the U.S. Postal Service and the National Weather Service, have reported attacks.