Manbahadur Chhetri, a daily-wage labourer, working inside the camp, was injured in the attack by the jumbos and admitted to the cantonment hospital, they said.
Army personnel, with the help of forest department officials, were able to drive away the herd from the cantonment area. The Army camp was not damaged, officials said.
Meanwhile, the body of a 40-year-old mentally challenged man was found in Khairbari jungle in the district and forest officials suspect that he was killed in elephant attack.