At least six people were injured when gunmen fired on their convoy, reports suggest that no one is in a serious condition.
The group had been travelling from the Bamiyan province to the city of Herat in the west, when it was attacked.
No one has claimed responsibility for the attack.
The FCO advises against all travel to many areas in Afghanistan.
There is a high threat from terrorism and specific methods of attack are evolving and increasing in sophistication. There is a high threat of kidnapping throughout the country, FCO Advice.
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