US' top intelligence official Dennis C Blair said Pakistan's efforts against insurgents and terrorists has been mixed.
"Islamabad has demonstrated determination and persistence in combating militants it perceives dangerous to Pakistan's interests including Tehrik-e Taliban Pakistan and al Qeada and other associated operatives," Blair said.
Blair further said, "However, it still judges it does not need to confront groups that do not threaten it directly and maintains historical support to the Taliban."
He noted that Pakistan has not consistently pursued militant actors focused on Afghanistan.
"Simultaneously, Islamabad has maintained relationships with other Taliban-associated groups that support and conduct operations against US and ISAF forces in Afghanistan," he added.