In a statement issued Thursday morning, the Office of the Secretary to the Governor General said there had been 'an unauthorized access to its internal network.'

Russian hackers are suspected in a sweeping campaign that hit U.S. Departments of Homeland Security, Treasury and Commerce, and prompted officials to scramble.

Canada said Wednesday that it fears foreign actors could try to disrupt power supplies, and for the first time pointed the finger at state-sponsored programs in China, Russia, Iran and North Korea as major cyber crime threats.