The Department of Defense has identified three of the four Americans who were killed by a suicide bomber in Syria on Wednesday. They were Army Chief Warrant Officer Jonathan Farmer, 37, of Boynton Beach, Florida; Navy Chief Cryptologic Technician Shannon Kent, 35, of upstate New York; and DOD civilian Scott Wirtz of St. Louis. The Pentagon confirmed that the three died in Manbij as a result of “wounds sustained from a suicide improvised explosive device.” The fourth American killed was not military so the Pentagon won’t release his name, but he was reportedly working as a contractor supporting the Defense Department. The explosion killed at least 14 people in total, including eight civilians and two fighters from the U.S.-backed Syrian Democratic Forces. Three other U.S. service members were injured in the attack. The Pentagon believes the attack was carried out by ISIS.