"According to us, there were four plus two (terrorists). But, it is for the investigating agency...It is for the NIA to investigate and come up with factual details," NSG Director General R C Tayal told reporters on the sidelines of an international seminar on the menace of Improvised Explosive Devices (IEDs) being held here.
The January 2 attack on the forward air force base, which houses fighter jet planes and attack helicopters, had left seven security personnel dead.
Security forces had recovered four bodies of terrorists and there has been speculation since about the possibility of some others getting killed and 'melting up' in a building which was blown up by NSG using heavy explosives.
Tayal said he had "basis" for this assertion.
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The DG, however, said none of his 'black cat' commandos
saw the hiding terrorists as continuous firing was taking place.
"Only thing we got to know was when we went to place the 'wall through radar' we heard a voice inside saying that NSG has come. The radar gives indication if there is any movement inside. It does not indicate exactly if there is a human being, but it indicates movement," he said.
"Let me clarify, the NSG standard operating procedure is very clear. It is that if NSG is deployed at a place where terrorist incident takes place, it is NSG that controls the situation. There is no confusion about it.
"There was absolutely no confusion about the chain of command. All the agencies were working with a good synergy. The central government can deploy NSG suo motu or on request of the state government but the fact remains that once NSG is deployed to control a situation, the NSG is given complete control over that situation and not the whole area," he said.
Officials supervising the operation said there were as many as 57 explosions in that building and that indicates there was heavy ammunition present in the complex which is just meant for housing IAF personnel.
The radar showed, an official said, that people present inside had stacked up 'charpoys' and almirahs against the gate in order to prevent any entry.