US scrambling to understand fallout of suspected Russia hack

At least six government departments breached in likely Russian intelligence operation thought to have begun in March

The US government is still in the dark over how deeply Russian hackers penetrated its networks during the worst ever cyber attack on federal agencies, members of Congress warned on Friday.

At least six government departments were breached in a likely Russian intelligence operation thought to have begun in March. Although there is no evidence that classified networks were compromised, it is not known what the hackers may have stolen or how long it will take to purge them.