The FBI says it is investigating the murders as a 'terrorist act' in the San Bernardino shootings...

FOX News' Jeff Monosso is live in California:

The FBI confirms what many residents here and people across the country already assumed...

(Bowdich) "Based on the information and the facts as we know them, we are now investigating these horrific acts as an act of terrorism."

The FBI's David Bowdich saying that they continue to piece together more details from cellphones and computer hard drives that Tashfeen Malik and Syed Farook thought they destroyed... Including evidence that Malik pledged allegiance to the terror group ISIS on her Facebook page.

Sources also tell us that Malik may have radicalized her husband, who we're told was in contact with the terrorist group overseas.

The FBI's new designation of this investigation makes this the deadliest attack on U.S. soil since 9/11.

In San Bernardino, Jeff Monosso, FOX News.

(AP Photo/Ringo H.W. Chiu)
(AP Photo/Ringo H.W. Chiu)

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