NEW : Haqqani military official says U.S. comments are a way to pile pressure on Pakistan . U.S. 's U.S. envoy says Panetta 's remarks are unhelpful . Pakistan defense secretary : Islamabad has yet to respond to Panetta 's remarks . Militants must not be able to use Pakistan as a `` safety net '' Taliban 's criticism of Pakistan is not a significant change in tone , an analyst says .
NEW : Haqqani military official says U.S. comments are a way to pile pressure on Pakistan . U.S. 's U.S. envoy says Panetta 's remarks are unhelpful . Pakistan defense secretary : Militants must not be able to use Pakistan as a `` safety net '' Taliban 's criticism of Pakistan is not a significant change in tone , an analyst says .