An Improvised Explosive Device (IED) went off in Khyber Agency's Sheen Drang area, killing one Khasadar personnel on Sunday, reports the Dawn.
An official was injured in the blast and has been transferred to a hospital in Peshawar.
While no group or individual has claimed responsibility for the blast yet, security has been tightened in the entire area in the aftermath of the incident.
Khyber Agency is among Pakistan's seven semi-autonomous tribal districts near the Afghan border, widespread with homegrown insurgents and foreign militants.
Earlier this week, the Pakistan Army launched Operation Khyber-4 under RuF to "wipe out terrorists" in the Rajgal Valley area of Khyber Agency.