U.S. FBI Director Christopher Wray testifies before a Senate Judiciary Committee hearing on "Oversight of the Federal Bureau of Investigation" on Capitol Hill in Washington, D.C., the United States, on July 23, 2019. (Xinhua/Liu Jie)

The rioters came from "a variety of backgrounds," says Christopher Wray.

WASHINGTON, March 2 -- Christopher Wray, director of the Federal Bureau of Investigation (FBI), said on Tuesday that the law enforcement agency classifies the deadly Jan. 6 Capitol riot by former President Donald Trump's supporters as domestic terrorism.

"That attack, that siege, was criminal behavior, plain and simple, and it's behavior that we, the FBI, view as domestic terrorism," Wray said at a hearing before the Senate Judiciary Committee.