18 June 2017, 05:37 GMT
MOSCOW (Sputnik) – The attack took place late on Monday in the district's Shah Kah village.
The victims served at the Bagram Air Base, the largest US military base in Afghanistan located some 30 miles north of the the country's capital of Kabul.
Afghanistan has been suffering from instability for years, with government troops fighting against the Taliban and the Islamic State terrorist group (outlawed in Russia), as well as other radical groups.
