Eight US civilians were killed in a suicide attack on a military base in Afghanistan's southeastern Khost province.
‘We can confirm that there was an explosion in Khost province and eight Americans have been killed,’ a US official in Kabul.
No US or NATO troops were injured in the blast at Forward Operating Base Chapman.
Attacks in Afghanistan this year have spiralled to their highest levels since the Taliban were overthrown by US-backed Afghan forces in late 2001.
Civilian and military casualty tolls have reached record levels this year, with suicide attackers even targeting United Nations employees at a guesthouse in the heart of Kabul.
Khost, on the Pakistani border, is one of the areas of Afghanistan where the Taliban insurgency is strongest, and most foreigners there are troops or working under military protection.
