“There are frequent rumors that various jihadist groups are going to defect from the Taliban-al Qaeda axis and join the Islamic State. One organization that is often mentioned in this vein is the Pakistani Taliban (Tehrik-e-Taliban, or TTP). But earlier today a spokesman for the group, Muhammad Khorasani , denied the latest iteration of this gossip. According to Khorasani, these reports are ‘based on lies.’ Any claims that Mullah Fazullah, the head of the Pakistani Taliban, has sworn allegiance to ‘DAESH’ (a derogatory Arabic acronym for the Islamic State’s name) are ‘false.’”
Source: Pakistani Taliban spokesman says reports of joining Islamic State are ‘lies’ | The Long War Journal