Two officials in Helmand say the attack took place on Saturday night. They say the attackers targeted a checkpoint belonging to the pro-government militiamen in Gareshk district.
The two officials spoke to The Associated Press today on condition of anonymity because they were not authorised to talk to the media.
Omar Zwak, spokesman for the provincial governor, says an investigation is underway.
Qari Yusouf Ahmadi, a Taliban spokesman, claimed responsibility for the attack in a statement sent to the media.
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