Pakistan's security forces and its intelligence agency have facilitated the rise of the Taliban, with whom they have an 'ambiguous' relationship, a former top American army official, now headed to become the country's representative to Afghanistan has said.

ISI's relationship with Taliban remains 'unclear and ambiguous,' Lt Gen Karl Eikenberry, nominated by the US President as his next Ambassador to Afghanistan, said terming it a focus area for the US administration right now.