Interior Minister Rehman Malik on Thursday again made it clear that Pakistan has no secret agreement with US or NATO urging America must understand the difference between true friends and foes. Rehman Malik expressed these views while talking to host of journalists outside Parliament House here on Thursday. Rehman said that Pakistan has sacrificed the most in war against terrorism. He said that Prime Minister is taking keen interest in border violation terming it gruesome. He went on to say that NATO should remain in its mandate stressing no intrusions into our border would be tolerated. Pakistan would not tolerate border violations and investigations have been launched into the incident of killing of three security officials in Kurram Agency by NATO jets bombardment, Rehman pointed. He further added that Government must be allowed to continue its state of affairs without asserting pressure.