Kabul, Afghanistan (CNN) - An American intelligence official vowed Thursday that the United States would avenge a suspected terrorist attack on a U.S. base in Afghanistan that resulted in the deaths of seven CIA officers.
Two of those killed were contractors with private security firm Xe, formerly known as Blackwater, a former intelligence official told CNN. The CIA considers contractors to be officers.
A current intelligence official confirmed that the casualties included a mix of people - CIA staff and contractors. Six others were wounded.
The Taliban has claimed responsibility for the attack, which occurred on Wednesday.