Open source
The secret department of the FBI is investigating Russian efforts to manipulate US presidential election.
This was reported by CNN, referring to the sources.
The department within the FBI is known as Counterintelligence Division. It is responsible for "protecting the secrets of the US intelligence community, the advanced technologies of American institutions both public and private, keeping weapons of mass destruction away from US enemies and countering the activities of foreign spies, including cyberintrusions." The investigation regarding the election involves about 15-20 agents.
