Provincial governor spokesman, Fawad Askari, confirming the report, said the incident took place Saturday in Bakwa district, after a group of Taliban militants ambushed a patrol of the Afghan soldiers.
Mr. Askari confirmed that four Afghan soldiers were kille and four others were injured following the attack.
He said the militants managed to flee the area after the Afghan national army soldiers.
Gen. Zahir Azimi, spokesman for the defense ministry of Afghanistan also confirmed that four Afghan national army soldiers were martyred in Farah province.
No group including the Taliban militants has so far claimed responsibility behind the incident.
Farah is among the relatively peaceful provinces in western Afghanistan, however, Taliban militants and other insurgent groups are active in a number of its districts, and the militants often carry out attacks against the Afghan security forces and government officials.