BUENOS AIRES: A bus carrying Argentine border patrol officers crashed into a ravine in the northern province of Salta on Monday, killing 42 people, while nine were being treated for injuries. The bus fell about 18 metres. The vehicle was part of a three-bus convoy carrying officers of Argentina’s gendarmerie, which patrols the country’s borders. Salta borders Bolivia, Chile and Paraguay. Passengers on the other two buses were the first people on site to attempt to save the officers trapped in the wreckage. Argentina has emerged as part of a route used for smuggling Andean cocaine to Europe.