Fourteen Americans were killed in a series of helicopter crashes in Afghanistan today. NATO's International Security Assistance Force said in the first crash, a helicopter went down in the country's west killing seven U.S. service members and three U.S. civilians. Those injured include 14 Afghan service members, 11 U.S. service members and one U.S. civilian. According to the US embassy in Kabul, three of its Embassy members were among the fatalities in the crash in western Afghanistan. The military said enemy action was not suspected in the crash. In another incident, four other U.S. service members were killed when two helicopters apparently crashed mid-air in southern Afghanistan. Two other NATO service members were injured. The incident is currently being investigated, but it is confirmed that hostile fire was not involved. In a separate incident, the joint international security force killed more than a dozen militants while searching a compound. The site was thought to harbor insurgents tied to narcotics trafficking in western Afghanistan. The militants were killed in a firefight when insurgents confronted the joint force. ISAF said as the force was leaving, a helicopter went down due to unconfirmed reasons. A recovery operation was launched.