At least 10 people, including six children, were killed and 13 others, including four Khasadar officials, injured as a bomb went off near a passenger van in Gudar area of Central Kurram Agency on early 25 April.
"An anti-tank mine was buried on the roadside," a political administration official told The Express Tribune.
"It was a rutted path in an area that is at a distance," he added.
Last month, at least 28 people were killed and more than 100 were wounded when a suicide bomber detonated a car 'rigged with explosives' outside an Imambargah in a busy marketplace in the main town of Kurram tribal region.
The violence sparked protests by local residents in Parachinar, the administrative headquarters of the agency