Two American officers were shot and killed Saturday at the Interior Ministry in Kabul, Afghanistan, reported the New York Times.
NATO pulled out all military advisers from Kabul after protests against the burning of the Quran raged throughout the country for the fifth day, reported msn.com.
Msn.com reported the identity of the gunman is unknown, but an aggresive search is under way to find out who the person was.
The New York times reported the killings happened in one to the most secure areas of the building.
The Afghan Taliban claimed that two of their fighters were able to enter the building and kill four U.S. adviser, according to msn.com.
A member of the Taliban said the attack was a direct response to the desecration of the Quran by U.S. forces, said msn.com
The identities of the two U.S. officials were not given in either report.