The arrest of the Afghan Taliban's former number two figure may have been the result of an internal feud and purge among Taliban leaders, the commander of U.S. and NATO forces said on Thursday. The arrest in Pakistan of Mullah Abdul Ghani Baradar, in a U.S.-Pakistani operation confirmed last month, was described as a major intelligence coup and a possible sign Islamabad is becoming more willing to help fight Afghan militants. A theory in some intelligence circles, however, is that Baradar was captured only after he had already effectively been expelled from the Taliban after an internal tribal feud, leaving behind a more radical rump Taliban leadership. - Reuters