KABUL, Afghanistan --Military officials say two U.S. service members were killed in a possible insider attack at a special forces site in Afghanistan. At least eight others were injured in Monday's attack.
The shooting occurred at a U.S. special operations outpost in Wardak province in eastern Afghanistan, U.S. officials said. The shooter, who was dressed in an Afghan military or police uniform, was shot and killed.
"We have two confirmed dead, but the toll could rise," one U.S. official said.
A senior official in the Afghan Defense Ministry said that at least three Afghans were also killed.
Taliban claimed responsibility for the attack in a text message sent by
Taliban spokesman Zabihullah Mujahid.
The shooting occurred during a group meeting or briefing, a spokesman for NATO's International Security Assistance Force said.
Monday's incident marks the first time Americans have been killed by enemy contact in Afghanistan since Jan. 7, according to U.S. officials.
An ISAF official said the shooter was wearing an Afghan National Security Forces uniform.
The attack took place as a deadline expired for U.S. special forces to leave the eastern province of Wardak, after Afghan President Hamid Karzai accused them and Afghans working for them of overseeing torture and killings in the area.
It was not immediately clear if the attack was directed at U.S. special forces.
U.S. Secretary of Defense Chuck Hagel, who left Afghanistan early on Monday after a three-day visit, raised the sensitive issue of Wardak when he met Karzai.
U.S. forces have denied involvement in any abuses in Wardak.