Two U.S. service members were killed in a suicide bomb attack on a Nato convoy near Kandahar, in southern Afghanistan, on Wednesday.
The service members were part of an international force referred to as the Train, Advise and Assist Command South, a reference to their location in the country.
A Pentagon spokesman has further confirmed that there is no information on the number of troops wounded as yet.
The Taliban has taken the responsibility for the attack and has said the attack destroyed two armoured tanks.
The attack comes even as the Afghan authorities in western Herat province tightened security ahead of a mass funeral for the victims there of an attack the previous evening that killed 32.
Another 66 worshippers were injured in a suicide assault on Tuesday evening, when a suicide attacker sprayed bullets at the private guards protecting the worshippers performing their evening prayers at the mosque.