Police believe that Syed Rizwan Farook and Tashfeen Malik, the suspects in Wednesday's terror attack in San Bernardino, were planning "multiple attacks" in addition to the shooting/failed bombing on Wednesday at Farook's office's holiday party.
It is unknown where, if anywhere, the couple would have targeted, but the sheer volume of firearms, ammunition, and explosives stockpiled by the couple suggest that they had plans for other attacks.
U.S. investigators are increasingly convinced the California shooters planned multiple attacks, given their stockpile of weapons, and are looking at whether the Pakistani woman involved radicalized her American husband, officials said on Sunday.
Investigators believe the weapons cache collected by Tashfeen Malik, 29, and her husband, Syed Rizwan Farook, 28, points to more attacks but they do not have evidence on other possible targets, a senior U.S. government source told Reuters.
The couple stormed a gathering of his work colleagues in San Bernardino, California, on Wednesday, opening fire with assault-style rifles and killing 14 people. The pair were killed a few hours later in a shootout with police.
U.S. authorities were trying to learn what contacts Malik might have had with Islamic militants in Pakistan and Saudi Arabia, where she grew up, the official said on condition of anonymity.
Malik and Farook were killed on Wednesday in a shootout with the police.