Security threats to India from militant groups operating from Pakistani soil have not diminished, Home Minister P Chidambaram said on Friday.
He also said that there has been an increase in infiltration from the Pakistani side in the last four months.
New Delhi's concerns were conveyed by him during meetings with Secretary of State Hillary Clinton and top security officials of the Obama Administration.
Wrapping up his four-day US visit, Chidambaram told reporters here that he was going back to India with a "lot of ideas". One of these was establishing something on the lines of the National Counter-Terrorism Centre of the US.
Set up in 2004 under a US Presidential executive order, the Centre staffed with over 500 personnel drawn from 16 departments and agencies spearheads US efforts to combat terrorism at home and abroad by analysing threat perceptions and sharing information with friendly countries.
Besides Clinton, Chidambaram met National Security Adviser James Jones, FBI Director Robert Mueller, Homeland Security Secretary Janet Napolitano and US Attorney General Eric H Holder Jr Early.
Chidambaram said he had briefed the US officials about Pakistan not prosecuting perpetrators of the Mumbai terror attacks, including the mastermind Hafiz Mohammad Saeed, founder of Lashkar-e-Toiba, who was roaming free in that country despite evidence provided by India.