Afghan intelligence officials say an American civilian engineer has been found murdered in Kabul.

The officials, who did not want to be named, told news agencies Tuesday that the man's body was found in the Afghan capital the day before.

On Monday, NATO said that a U.S. Department of Defense civilian employee had died in eastern Afghanistan, but gave no other details.

Despite tight security in the Afghan capital, insurgents have been able to carry out high-profile attacks in Kabul.

Also Tuesday, Afghan authorities recovered the bullet-riddled bodies of two Germans who disappeared last month while hiking in northern Afghanistan.

The bodies were discovered on Monday in a remote area near the Salang Pass in Parwan province.

Separately, Afghan officials say a roadside bomb Tuesday killed a district governor and three of his bodyguards in the eastern province of Nangarhar. Sherzad district chief Asel Ahmad Khogyani was killed when the blast hit his vehicle.