A roadside IED blast today killed at least two security personnel in Pakistan's restive northwest tribal region.
The Improvised Explosive Device (IED) which had been planted on the roadside exploded near a security personnel check post in Khyber's Tirah Valley.
Two security personnel were killed in the blast, officials said.
Meanwhile, in a separate incident 12 people including four children were injured in an explosion in Began Bazar area of Lower Kurram Agency near the Pak-Afghan border.
Khyber is one of Pakistan's seven semi-autonomous regions governed by tribal laws and lies near the Afghan border.
Pakistani troops have been engaged in a full-scale offensive against Taliban and other militants in North Waziristan region under an operation named 'Zarb-i-Azb', and also in Khyber, named Khyber-1.
The operation has been intensified following the massacre of over 150 people, mostly students, by Taliban gunmen at an army-run school in Pashawar in December.
The Taliban and its allies have been waging an insurgency for more than a decade in Pakistan, seeking to install their own brand of fundamentalist Islamic rule.
