A suspect is in custody after an attack in Boulder in which six people were burned, with witnesses saying the suspect threw Molotov cocktails at a march for Israeli hostages.

Officials have found 15 victims and one dog in a Molotov cocktail attack on Pearl Street Mall on Sunday, according to the Boulder County District Attorney’s Office.

Boulder Police Chief Stephen Redfearn had reason to believe a Sunday afternoon attack on the Pearl Street Mall was terror. At 1:26 p.m., a man had thrown Molotov cocktails at a group walking to raise awareness of Israeli hostages being held by the terrorist group Hamas.