The spies came from China, Russia and other countries, these officials said, and were believed to be on a mission to navigate the U.S. electrical system and its controls. The intruders haven't sought to damage the power grid or other key infrastructure, but officials warned they could try during a crisis or war.

A spokesdroid with to these charges:

"The incident of attacks on the U.S. electrical grid from China and Russia simply does not exist," Chinese foreign ministry spokeswoman Jiang Yu told reporters, according to a transcript of the briefing.

(Also, that thing that happened a few years back with ? Just a silly misunderstanding.)

Is this just fearmongering by the feds, or have we really been compromised? Wired blogger Kevin Poulsen is deeply skeptical; to take over control over the national light switch.