There is no information on the nationality of the victims yet.
"Two mini buses carrying foreign tourists were attacked by gunmen along a main road in Chishti Sharif District Thursday morning. As a result of the incident 10 people were killed and five others wounded," Khadimi told Xinhua news agency.
According to the governor, the buses were traveling from central Bamyan province to Herat province.
None of the regional militant groups have claimed responsibility for the attack yet.
Afghanistan is experiencing political, social and security instability, as the Taliban Islamic movement and other radical extremist organizations such as Daesh, which is prohibited in many countries, including Russia, continue to stage attacks against civilian and state targets.