's Tirah Valley.According to a security official, the bomb which had been planted on a roadside, went
kaboom!when security personnel were on a routine patrol of the area, where the army is currently involved in Operation Khyber-2.
As a result of the IED attack, three security personnel, including a Pakistain Army captain were killed in the attack.
The area is off-limits to journalists, making it difficult to independently verify the number and identity of the dead.
Khyber Agency is included in Pakistain's seven semi-autonomous regions governed by tribal laws and lies near the Afghan border. The Taliban and other Al Qaeda-linked groups who stage attacks in both Pakistain and Afghanistan are also known to have strongholds in the zone.