Washingon, Apr. 7 : The United States has once again raised concerns over the Pakistan's Inter Services Intelligence (ISI) links with outlawed extremists groups.
In an interview to a private Afghan television channel, US Secretary of Defense Robert Gates said: "The ISI''s contacts with some of the extremist groups like Gulbuddin Hekmatyar, the Haqqani network, Commander Nazir and others are a real concern to us."