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.

Witnesses told authorities that the suspect used a "makeshift flamethrower and threw an incendiary device into the crowd, " said Mark Michalek, who heads the FBI's Denver office. He identified the suspect as Mohamed Sabry Soliman, 45. Redfearn added those devices included Molotov cocktails being tossed at the crowd.