Afghan officials say a powerful roadside bomb has killed seven policemen in the country's western Herat Province.
The officers belonged to the Afghan Public Protection Force, a government-run unit that provides security for international supply convoys, aid groups, and foreign-funded reconstruction sites.
They worked as guards at the Salma hydroelectric dam, which is being rebuilt by India in Herat Province.
The explosion on May 21 was so strong that the police vehicle was completely destroyed and everyone in it was killed.
No group has claimed responsibility for the attack, but similar bombs are often blamed on the Taliban, who routinely target Afghan government officials and international forces in Afghanistan.
Based on reporting by AP and AFP