NATO contractors killed by Kabul car bomb identified as U.S. citizens

Afghan security personnel (L) keeps watch next to a damaged car belonging to foreigners, after a bomb blast in Kabul, Afghanistan August 22, 2015. REUTERS/Ahmad Masood

KABUL (Reuters) - Three U.S. contractors were among 12 killed by a Kabul bomb that targeted their NATO convoy, the U.S.-led coalition said, making the attack one of the most lethal for U.S. citizens in Afghanistan in recent years.

The suicide attack outside a hospital on a residential street at rush hour killed mainly Afghan civilians and injured scores more, heightening the anger felt in Kabul after a barrage of deadly blasts this month killed dozens.