The governor of Herat province, Faizullah Wahidi, said the de-miners all Afghan were released unconditionally after being abducted in the Pashtun Zargun district as they drove to an area that needed to be cleared of mines.
Wahidi did not know who kidnapped the de-miners or why. He said police were investigating.
All the men worked for the British-based HALO trust, which specializes in removing hazardous mines and other ordinance left over from wars. HALO confirmed the kidnapping and release.
After 30 years of near continuous conflict and war, Afghanistan is one of the most heavily mined countries in the world.