"About 16 insurgents attacked a voter registration site in Terzayi area of Khost province near the Pakistani border in the early hours of Wednesday July 6," spokeswoman Ariane Quentier told media men at a press briefing.
There were no casualties in the incident. However, she confirmed that the attackers temporarily abducted some national staff and later released them near the border.
The incident, she added, led to the disruption of the registration process temporarily but the process reopened Thursday.
She did not point finger at any particular group or individual, but the Taliban fighters whose regime was ousted by US military in late 2001 have vowed to derail the coming legislative polls.
In its efforts to enable all Afghans to participate in the polls, the UN-sponsored Joint Electoral Management Body (JEMB) or Afghan Election Commission has opened update registration sites across the country and urged all those who has not obtained election card to sign up.
Over 10 million Afghan eligible voters are going to participate in the first post-Taliban parliamentary polls slated for Sept. 18.