(CNN) — Four Americans were killed during a rocket attack at Bagram Air Base, outside of Kabul, a Pentagon official said Tuesday on the condition of anonymity.
The U.S.-led International Security Assistance Force confirmed that four NATO coalition service members had been killed in an attack but did not disclose the nationality of the casualties or the exact location of the attack.
ISAF said the four were killed in an “attack in eastern Afghanistan.”
The Taliban claimed responsibility for the attack, the group said in a statement.
News of the casualties came as NATO-led troops transferred security responsibility to Afghan forces.