Ever since it broke away from the Pakistani Taliban in 2014, Jamaat-ul-Ahrar or the Freedom Movement had been carrying out sporadic attacks, often weeks or months apart.
But since the beginning of September, it has struck 10 times, including a horrific bombing of a mosque earlier this month that killed 36 people, many of them children.
The Pakistani Taliban, or Tehrik-e-Taliban, have been struggling in the face of a two-year offensive by the military against its bases in North Waziristan, along the Afghan border. The assault has hampered its ability to carry out attacks and fueled splits by factions breaking away from the movement.
In contrast, Jamaat-ul-Ahrar has continued its blows even after military assaults on its home territory in Mohmand, another tribal area in the northwest of the country along the border with Afghanistan. It gained notoriety in late 2014 when it took responsibility for a vicious attack on a public army school that killed 125 people, most of them children, and again in early 2016 with a series of brutal attacks, including suicide bombings against Christians in Lahore on Easter that killed more than 70 people.
A counter-terrorism official in northwestern Pakistan said Jamaat-ul-Ahrar is the most extreme of the militant groups operating in the Afghanistan-Pakistan border region and poses a "serious challenge" to security forces. He spoke on condition of anonymity because he is not authorized to speak to the media.
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