The US today said that existence of terror groups in Pakistan is against the interest of the region and that Islamabad will have to take the tough decision of going after such groups without making any discrimination. <br/><br/>US National Security Adviser James Jones said that Washington has expressed strong concerns over the existence of terrorist organisations within the borders of Pakistan.<br/><br/>In an interview to a television channel, he said, It is contrary to Pakistan's own interests, for the future and the stablity of the region to continue to tolerate the existence of insurgents within their borders.<br/><br/>He said if Pakistan wants to correct, it will have to make the tough decision to go after the terrorist organisations and declare concretely and publicly that terrorism cannot be tolerated.<br/><br/>Asked whether action against Jamat-ud-Dawa chief Hafiz Saeed, the alleged mastermind of the 26/11 Mumbai attacks, would be a test case for Pakistan, Jones said the US expected Islamabad to deal with all aspects of terror.<br/><br/>Asked whether Indian investigators will get more access to Pakistani-American LeT operative David Coleman Headley, he said the Indo-US ties are such that the US is willing to cooperate on anything that New Delhi required to better understand threats to it from terror outfits. Jones said the access Indian investigators got to Headley reflected growing good relations between the two countries.