US intelligence agencies, including the Federal Bureau of Investigation (FBI), are alarmed over evidence of continued LeT's presence on US soil, including back-up cells in Pakistan, especially after the 26/11 Mumbai terror attacks.
According to sources, officials are of the view that LeT's global nexus may prove more dangerous for the security of US than al-Qaeda.
Former Deputy National Security Adviser for counter-terrorism, Juan Zarate also admitted that LeT has bases across the world, including the United States.
Evidence available with the investigation agencies also prove that several young US residents have been trained in Lashkar's camps, and they have returned to the US Reports show a Lashkar interest in several big, cities including New York, California, Georgia and other locations.
FBI director, Robert Mueller had also viewed a possibility of a Mumbai-style commando attack in US by militants of less well-known terrorist groups.