Five people were killed when the small plane they were traveling in crashed in west central Brazil, the Air Force reported Sunday. The light aircraft crashed Saturday on the outskirts of the city of Corumba, in Mato Grosso do Sul state, along the country\'s border with Paraguay and Bolivia. The plane had taken off from the state capital, Campo Grande, some 400 kilometers away from the crash site, at dawn, and reportedly sent an emergency warning an hour into the flight. Air Force personnel were not able to locate the site of the accident until in the afternoon, and officials say they don\'t know what caused the crash. Rescue workers found five bodies when they arrived at the scene. The Air Force said the passengers were heading to a hacienda in Brazil\'s Pantanal region, along the border.