No one immediately claimed responsibility for the twin explosions that killed at least 12 people and left more than 50 injured.
No group has claimed responsibility for the attack, though it is suspected that the Pakistani Taliban might be involved.
The southeastern country is witnessing increased attacks on security forces after The banned Tehrik-i-Taliban Pakistan (TTP) ended a cease-fire with the government last November.
Brigadier Mustafa Kamal Barki of powerful Inter-Services Intelligence, the nuclear-armed nation's main spy agency, was killed and seven others of his team were wounded in an encounter with militants, Pakistani military says.
Reopening of Torkham crossing brought relief to the traders and others who were jammed at the border for four days, allowing thousands of vehicles with fresh produce to start moving anew along the Khyber Pass.
The death toll from Monday's bombing of mosque in northwest Pakistan rises to 102, as police say they are closing in on the suspect.
Authorities are also probing the possibility that people inside the compound helped to coordinate the attack.
A TTP spokesperson has denied any hand in the suicide bomb attack on a crowded mosque in Peshawar as tension mounts between Pakistan and Afghanistan’s Taliban leaders.
The bomber carried out the attack during afternoon prayers when the mosque was packed with worshipers and most of the victims were reportedly police officers from a nearby station.
The attack comes two days after a similar incident in country's northern Khyber district killed three police officers.
Terrorists attacked a police station in Peshawar, the capital of northwestern Khyber Pakhtunkhwa province of Pakistan which has seen a rise in terror attacks launched by outlawed Tehrik-i-Taliban Pakistan in recent months.
Five soldiers were killed when a roadside bomb exploded in a remote area in the southwestern province of Balochistan, while the sixth was killed in a shootout with the Pakistani Taliban in Zhob district.
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