It appears that Tehreek-e-Taliban Pakistan is either making raids cross border, or seeking alliances or arms judging by who was killed in a recent clash with Afghan and NATO forces in Afghanistan. From the Hindu News:
The dead Taliban belonged to the Wazir tribe and were members of a group led by Pakistani Taliban Mullah Nazir, who operates in the South Waziristan tribal region. Among the dead were Maulana Muhammad Iqbal, deputy chief of Mullah Nazir’s group, and Khan Mohammed Wazir, another key Taliban commander.
Three of the dead Taliban were aged between 15 and 20 years, local tribesmen said. The bodies were repatriated to Wana from Afghanistan’s eastern Paktika province early today, the Taliban sources said.
The skirmish in Paktika left 13 Taliban militants and eight NATO and Afghan troops, including a colonel, dead. Witnesses said the bodies of the Pakistani Taliban were badly burnt, making it difficult to identify them.
More on Taliban captured and killed this weekend here.