Seven people, most of them children, were injured when a startled camel started bucking during a Pittsburgh circus. Two children and an adult were riding the camel during an intermission Sunday at the Shrine Circus at PPG Paints Arena when it became startled, the Pittsburgh Post-Gazette reports. The newspaper says one child's arm was broken, which appeared to be the most serious injury. The incident happened around 3:30pm as people were buying rides on tethered camels, ponies, or elephants led by handlers, the AP reports. Public safety and circus officials did not immediately know what startled the camel. It was brought under control and the circus resumed. (More circus stories.)