The first attack was on a convoy carrying a former district chief in Helmand province, leaving the ex-official and four of his bodyguards dead, said the governor's spokesman, Ghulam Mohiudin.
The second attack occurred later when 30 of the slain official's relatives went to collect his body, the AP reports.
Khan said 25 people were murdered, including the brother and nephew of the dead official, Jama Gul. Four others were wounded.
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