'SUSTAINED' CYBERATTACK ON WHITE HOUSE

"WASHINGTON -- The White House computer network has been hit by what appears to be a sustained cyberattack, administration sources told HuffPost.

The White House -- or the Executive Office of the President (EOP) -- regularly gets hit with hapless cyberattacks from all corners of the web, but the one revealed Tuesday, said people familiar with the situation, has been much more significant in duration and strength, putting the system on the fritz for nearly two weeks, if not longer.

A White House official confirmed on Tuesday that the White House had "identified activity of concern on the unclassified EOP network." Network outages are not uncommon in the White House, but they typically last no more than a few hours. For the system to be damaged for days on end indicates an attack of significant strength.

"Certainly a variety of actors find our networks attractive targets and seek access to sensitive government information. We are still assessing the activity of concern, and we are not in a position to provide any additional details at this time," the White House official said in a statement.

The network outages have been a defense mechanism, White House staff were told in an internal note obtained by HuffPost. "Our computers and systems have not been damaged, though some elements of the unclassified network have been affected. The temporary outages and loss of connectivity that users have been experiencing is solely the result of measures we have taken to defend our networks," the email reads.

White House press pool reports sent by email Tuesday night were "significantly delayed," according to pool reporter Steven T. Dennis of CQ Roll Call. "Some people are getting pool reports significantly before other people," Dennis reported. He said later that the pool report delays "appear to now be resolved."