Bangladesh has emerged as a launch pad into India for Pakistan-based terror groups like the Lashkar-e-Tayiba and Dhaka is not cooperating with New Delhi in cracking down on them, National Security Advisor M K Narayanan said on Thursday.

Responding to questions from media, Narayanan said Bangladesh is a sanctuary and a launch pad into India for terrorist groups like LeT.

Most leaders of militant and underground outfits operating in the north-eastern states like Manipur are in Bangladesh, he told reporters at an interaction in Bangalore with police officials from Karnataka.

"We regard Bangladesh as an area which gives sanctuary to these (leaders of militant groups). We have been in touch with the Bangladesh government," Narayanan said.

"I don't think the cooperation (from Dhaka) as we like is forthcoming as it should be. But that's something we will continue to press," he said.

On Pakistan not handing over terrorists wanted in India and the way forward, Narayanan said: "Obviously, they will not come (Pakistan would not hand them over)." But he added, "That's part of the dialogue and that will continue."

Earlier, he gave a perspective on the national security scenario at the interactive session. Senior police officials from Tamil Nadu and Andhra Pradesh also attended the two-and-half-hour session.