FBI more than doubles domestic terrorism investigations: Christopher Wray

FBI Director Christopher Wray told a U.S. Senate panel Tuesday morning that the bureau has been forced to surge resources toward its domestic terrorism investigations.

FBI Director Christopher Wray told a U.S. Senate panel Tuesday morning that the bureau has been forced to surge resources toward its domestic terrorism investigations in the past 18 months -- increasing personnel by 260% to help handle a caseload that has more than doubled from roughly 1,000 ongoing investigations to 2,700.

"Terrorism moves at the speed of social media," Wray told the Senate Homeland Security Committee. "You have the ability of lone actors, disgruntled in one part of the country to spin up similar like-minded individuals in other parts of the country and urge them into action."

Secretary of Homeland Security Alejandro Mayorkas, who appeared alongside Wray, agreed with him that social media is a "terrain that can so easily propagate misinformation, false information and allow communications to occur among loosely affiliated individuals."

Wray offered more detail during questioning with Sen. Mitt Romney, R-Utah.