Senate Judiciary Chair Dick Durbin asked FBI director Christopher Wray if he agreed that White supremacists and other violent extremists attacked the Capitol on Jan. 6.

Wray said the bureau is seeing "quite a number of what would we call militia violent extremists" as the FBI builds its cases agains the rioters. He specifically mentioned the groups the Proud Boys and Oath Keepers.

He added that they have seen in their investigations instances of "racially motivated violent extremists" who advocate for White supremacy.

"One of the things that is happening as part of this is that as we build out the cases on the individuals when we arrest them for the violence, we're getting a richer and richer understanding of the different people's motivations," he said. "But certainly as I said, militia violent extremism and some instances of racially motivated violent extremism, especially advocating for the superior of the white race."

Wray also noted that during his tenure as FBI director, he's seen a growth in the number of investigations related to racially motivated violent extremism.

"When it comes to racially motivated violent extremism, the number of investigations and number of arrests has grown significantly on my watch. And the number of arrests for example of racially motivated violent extremists who are what you would categorize as White supremacists last year, was almost triple the number it was in my first year as director," Wray said.