The Federal Bureau of Investigation will say later today that North Korea was behind the cyberattack on Sony, according to Reuters and CBS. Reuters reports that investigators will also say there may also be a link to China in the hack, with Chinese servers potentially being involved. It appears to be unknown if this link is because the hack was accomplished in collaboration with China or if Chinese servers were being used to hide the source of the attack. North Korea has been widely seen as the likely culprit in the cyberattack, though it has denied any involvement.