SCOOP/BREAKING NEWS: The Energy Department and National Nuclear Security Administration, which maintains the U.S. nuclear weapons stockpile, have evidence that hackers accessed their networks, officials directly familiar with the matter said.

Investigators found suspicious activity in networks belonging to the Federal Energy Regulatory Commission (FERC), Sandia and Los Alamos national laboratories in New Mexico and Washington, the Office of Secure Transportation and the Richland Field Office of the DOE.

DOE and NNSA officials have begun coordinating notifications about the breach to their congressional oversight bodies. Officials at DOE still don’t know whether the attackers were able to access anything, the people said—and may not know "for weeks"