According to the Inter-Services Public Relations, the media wing of the army, the terrorists attacked the security post in Dera Ismail Khan's Daraban area bordering the South Waziristan tribal district in the early morning hours.
A roadside bomb blast on Monday killed three personnel of the bomb disposal unit who were on their way to defuse another explosive device elsewhere in Peshawar, the capital of Pakistan's Khyber Pakhtunkhwa province.
The school at Badaber, 10 km south of Peshawar, was destroyed when militants set off six explosive devices. Police said at least 40 kg of explosives was used in the attack. No casualties were reported as the school was closed for the summer vacation.
At least 10 people, including women and children, were killed on Wednesday when armed terrorists attacked houses of pro-government peace militia members in northwest Pakistan.
The Tehrik-i-Taliban Pakistan have claimed responsibility for the attack.
At least 53 people have been killed and nearly 140 injured in Pakistan in separate attacks, including a deadly suicide bombing in restive Quetta city.
Even as Prime Minister Nawaz Sharif headed to the United States for the 70th session of the UNGA and for bilateral meetings to be held on the sidelines of the multilateral summit, back home all that is expected of him is to internationalise the Kashmir issue, or as Pakistan puts it, the 'Kashmir dispute'.