"Almost all the terrorist outfits across the border are intact and unfortunately many of them are in the vicinity of their army bases. It is a (cause for) worry and concern for us," he said when asked about reports suggesting that the Pakistan administration knew about Lashker-e-Toiba's plans to carry out another 26/11-type attack in India.

The Defence Minister was talking to reporters on the sidelines of an award function for Defence Public Sector Undertakings and Ordnance Factories.

Asked about reports suggesting the possibility of another 26/11-type attack in India, he said, "everybody knows very well that there is real threat to our security and it is a continuous one. So far, after 26/11 we have been able to prevent it to defeat their attempts. Their (terrorists') attempts are going on but we are also always on guard."

He said unless Pakistan takes "sincere and convincing action" against terrorist groups and disbands them, it would be "very difficult" for India to improve relations with it.

Asked what would be India's reaction if there was another major terror attack, the Defence Minister said, "We will act accordingly at that time... It is a hypothetical question. We are not leaving anything for chance."

On the steps taken to improve the security for the National Defence College, he said, "We know very well that there are forces which are every now and then trying to create problems in India in internal security as well as externally. So we are making all out efforts for not only the NDC but we are taking precautions everywhere," he said.

The NDC was one of the prime targets of LeT militants David Headley and Tahawwur Hussain Rana, arrested in the US by the FBI.