FBI Denver [press conference]: Witnesses are reporting that the subject used a makeshift flamethrower, and threw an incendiary device into the crowd. The suspect was heard to yell, 'Free Palestine' during the attack.

Boulder Police Chief: From everything we know, in the witness briefings, and interviews that we've done at this point, we do not believe that there is an additional suspect at large. We are not going to say that with absolute certainty because we're still conducting a lot of interviews, but we believe that the initial report of two suspects; we have not been able to confirm that, and we're fairly confident we have the lone suspect in custody.