Terrorists wearing black masks who rushed into the concert hall with rifles and AKs, indiscriminately firing into the audience. They had clearly studied the building's structure in advance. One gunman injured his right arm during the confrontation with the middle aged man but continued the pursuit with his left hand using an AK. Another gunman chased Rong Hui and the little girl through the corridors, whistling a cello piece, and fired a barrage of bullets at them. They were cold and professional in their execution.
