WASHINGTON (AP) -- A government contractor that handles hundreds of thousands of security clearance background checks for civilian and military workers says that it was targeted by a recent computer breach. A government official said the intrusion may have compromised information of some workers.
The contractor, USIS, said in a statement Wednesday that the cyberattack had "the markings of a state-sponsored attack."
USIS has already been under fire in recent months for its performance in conducting background checks on National Security Agency leaker Edward Snowden and Aaron Alexis, who killed 12 people during shootings at the Navy Yard in September 2013.
Under contracts with the Office of Personnel Management, the Department of Homeland Security and other agencies, USIS conducts many of the background checks on 4.9 million federal workers with security clearances.