Rescue efforts are underway for an American caver who fell ill while exploring deep cave in Turkey

Turkish and international cave rescue experts are working to save a 40-year-old American speleologist who became ill and is trapped more than 1,000 meters (3,280 feet) into a cave in southern Turkey. Mark Dickey became sick during an international expedition in Morca cave in southern Turkey’s Taurus Mountains, according to the European Cave Rescue Association. It described Dickey as “a highly trained caver and a cave rescuer himself” who has participated in many international expeditions.