Shimla: Two persons were killed and another was injured when a truck carrying them fell down at Katli Khad near Kupvai this morning, police sources said. Truck with number HP-63 3657 carrying three persons fell down in deep gorge, killing two of them on the spot while truck owner was reported to be critically injured and has been admitted in IGMC. However, the cause of accident is yet to ascertained. The deceased were identified as Manohar Singh (32) and Naryan Singh(34). Both belong to nearby Chirgaon and Koti villages respectively.