Russia Suspected In Major Cyberattack On U.S. Government Departments

Russian hackers working for the Kremlin are believed to be behind breaches of U.S. government computer systems at the departments of Treasury, Commerce and Homeland Security that may have lasted months before they were discovered, according to U.S. officials and media reports.

The hackers reportedly broke into the email systems at the government departments, but the full extent of the breach was not immediately clear as U.S. officials scrambled to make an assessment. There are concerns that hackers may have penetrated other government departments and perhaps many private companies as...