The gunmen reportedly abducted two others.

The incident occurred on the Ghor-Herat highway in Brak Khana area of Ferozkoh, media reports said.

An eyewitness, Haji Mohammad, told Pajhwok Afghan News two individuals in military uniforms stopped a vehicle carrying passengers from Herat to Ghor.

The gunmen then opened fire on the passengers, killing six people, said the eyewitness.

Meanwhile, in another incident, at least 16 Taliban militants and a policeman were killed during a clash between the two units in Afghanistan's Ghazni province, reports said on Tuesday.

The incident took place on Monday.

Additionally, 13 Taliban militants and three policemen were injured in the clash.

Law enforcement officers also confiscated five bikes and a vehicle belonging to the said militant outfit.

The Taliban has not yet commented on the report.