Colorado Gov. Jared Polis and community leaders gathered for a vigil Wednesday for the victims of a violent attack​ against a group marching to bring awareness to Israelis held captive in Gaza.

Eight people calling for the release of Israeli hostages in Gaza were injured at an outdoor mall in Boulder, Colorado, by a man who police say used a makeshift flamethrower and hurled an incendiary device into a crowd. The FBI immediately described the violence as a “targeted terror attack.”