The FBI announced Friday it is investigating the mass shooting as an act of terrorism. If proven to be terrorism, it would be the deadliest attack by Islamic extremists on American soil since Sept. 11, 2001.
A U.S. law enforcement official said Malik used a Facebook alias to pledge her allegiance to the Islamic State group and its leader just before the shootings.
FBI Director James Comey would not discuss whether anyone affiliated with IS communicated back, but he said there was no indication yet that the plot was directed by any other foreign terror group.
“The investigation so far has developed indications of radicalization by the killers and of potential inspiration by foreign terrorist organizations,” Comey said. He cautioned that the investigation has not yet shown evidence the couple was part of a larger group.
Despite signs of the couple’s radicalization, there “is a lot of evidence that doesn’t quite make sense” at this early stage, he said.