On Tuesday, ISIS took to its radio station to boast that the men who attacked the Muhammad Art Exhibit and Cartoon Contest in Garland, Texas, on Sunday night were "two soldiers of the caliphate." The claim, which has not yet been verified by any American officials, is the first attack on American soil for which the terror group has taken responsibility, but ISIS vowed it would not be the last:
We tell America that what is coming will be even bigger and more bitter, and that you will see the soldiers of the Islamic State do terrible things.
How Credible Is the ISIS Link?
As federal investigators seek to determine if either of the men involved in the shooting had links to terrorists, Garland Mayor Douglas Athas told "Fox & Friends" on Tuesday morning that there was "no evidence" of an Islamic State connection.
In recent months, ISIS has taken responsibility for deadly attacks in places like Tunis and Yemen despite little evidence of its involvement. Or, as Reuters put it, "Experts warn that militant groups have been known to claim credit for attacks in which they were not involved."
Some terrorists have claimed to have been inspired by ISIS, even without having received funding, training, or weaponry, further complicating the picture. One man involved in the Paris shooting in January and another in a hostage crisis a cafe in Sydney, Australia, last year sought to claim they were acting on behalf of ISIS.