KABUL, August 24, SPA -- Three NATO troops _ two from Estonia and one from the United States _ were killed in attacks in southern Afghanistan, authorities said Monday. The American service member died in an insurgent attackSunday, the U.S. military said without providing details. It was the 37th death for the U.S. military in Afghanistansince the beginning of August, The Associated Press reported.--SPA www.spa.gov.sa/694961