At least eight Americans died Wednesday in a suicide bombing at a military base in eastern Afghanistan, US officials said.
Conflicting reports were reaching the Pentagon on whether the victims were civilian or military in the bombing at Forward Operating Base Chapman in Khost province near the border with Pakistan.
The deaths were confirmed late Wednesday by a US official in the Afghan capital, Kabul.
A senior US official in Washington said the Americans were killed by an attacker wearing a suicide vest.
Another senior US official in Washington said there were conflicting reports on the number of casualties, and that other people were wounded in the attack.