At least two security personnel were killed and seven others injured in an explosion at their vehicle in Pakistan's northwest tribal area of Khyber Agency on Wednesday afternoon, local Urdu media reported.

Dawn News said that the blast happened when the forces'vehicle hit a landmine in the restive Tirah Valley area of the Khyber Agency, a semi-autonomous tribal area along Pakistan-Afghanistan border.

The injured troops were shifted to a nearby hospital.

No group has claimed responsibility for the attack yet.

The blast happened one day after the Pakistani army launched an operation in the Tirah Valley area of Khyber Agency to reinforce troop deployment for effectively checking and guarding against movement across the porous border of the Agency.

The army also killed 14 militants and injured 11 others in aerial, ground operations in the valley on Tuesday, the army's media wing, Inter-Services Public Relations, said.

Source : XINHUA