Afghan Inside Attack Puts US Troop Deaths at 2,000 An apparent insider attack by Afghan forces has killed a U.S. service member and a foreign civilian contractor with NATO, officials said Sunday. The shooting - the latest in a string of attacks on international troops by their Afghan allies - marked the 2,000th U.S. troop death in Afghanistan over the long-running conflict. A U.S. official confirmed that the service member killed was American. The official spoke on condition of anonymity because the nationality of the dead had not yet been formally announced. At least two Afghan soldiers were also killed in Saturday's attack at an Afghan army checkpoint in Wardak province, said Shahidullah Shahid, a provincial government spokesman. An Afghan soldier turned his gun on the Americans and started shooting, Shahid said. He said the checkpoint was in Sayd Abad district, just outside a joint U.S.-Afghan base. FILE - In this July 9, 2010 file photograph, an Afghan National Army soldier wears an ammunition belt around his neck during a joint patrol with United States Army soldiers from Bravo Company, 2nd Battalion of the 508 Parachute Infantry Regiment of the 82nd Airborne, in the volatile Arghandab Valley, outside Kandahar City. U.S. military officials have noted that Afghan security forces are dying in insider attacks along with foreign troops, but so far, the Afghan government has not provided statistics on the number killed. (AP Photo/Kevin Frayer, File) Close "Initial reports indicate that a misunderstanding happened between Afghan army soldiers and American soldiers," Shahid said. He said investigators had been sent to the site to try to figure out what happened. An Afghan military spokesman declined to comment. The attacks are taking a toll on the partnership between international and Afghan forces, prompting the U.S. military to restrict operations with small-sized Afghan units earlier this month.