The provincial spokesman Jilani Farhad said the incident happened on Monday morning in Herat – Torghundi highway in Herat.
According to the official, the incident took place when a vehicle collided with a truck.
All seven passengers of the vehicle were killed in the incident, he added.
Accidents are common in Afghanistan’s highways where roads are often in a poor state.
Most of the traffic accidents are basically because of the carelessness, high-speed driving, insufficiency of traffic signs, and bad condition of the roads.