(CNSNews.com) - Attorney General Loretta Lynch says the FBI has taken over the investigation into the San Bernardino attack "because of the indications that we do have of radicalization."
Right now, it's a "terrorim investigation," she told NBC's "Meet the Press" with Chuck Todd. But Lynch couldn't fathom the motivation.
Todd asked Lynch about the husband-wife terror team: "Can you say definitively this morning they were both radicalized?"
"You know, I think I can't say definitively right now what led either of these two people to pick up guns and become murderers," Lynch responded.
"I can say that that is the focus of our investigation. We're looking at everything we can find out about these two killers' lives, how they grew up, where they grew up, how they met. All of those things will provide us guidance."
Although Lynch refused to discuss details of the "wide-ranging" investigation, she said the Pakistani-born wife of Syed Farook -- who came to the U.S. on a fiance visa -- is a major focus:
"We are trying to learn as much as we can about her life before they met, after they met, and, frankly, after she came here as well. What we are trying to focus on, again, is what motivated these two individuals. What led them not just to commit the act but to pick this particular place?"
Todd asked the attorney general about a report in Sunday's Los Angeles Times, quoting a relative of Taashfeen Malik say saying that she was once a "modern girl" who became religious during college and then began posting extremist messages on Facebook after arriving in the U.S.
"You know, I think what you see with these comments from friends and family and the information coming out from social media is a small part of what we're doing," Lynch said. "What the FBI is doing in gathering everything that we can find about her to build that larger picture.
"Everything that you've mentioned is part of that picture. At this point, it's just too early to say. So what I would say is I would caution people not to try and define either of these two individuals right now because we don't want to foreclose either any avenues of investigation or any other issues or motivations."
"Right now I would caution people not to try and define these two individuals...We are learning all we can about them."