New Delhi, Aug 27 - A former top official who coordinated India's nuclear weapons programme has cautioned that India should not be 'railroaded' into signing the Comprehensive Test Ban Treaty (CTBT) as the 1998 Pokhran tests were not sufficient from the security point of view.

'We can't get into a stampede to sign CTBT. We should conduct more nuclear tests which are necessary from the point of view of security,' K. Santhanam told IANS here.

'We should not get railroaded into signing the CTBT,' Santhanam said when asked about reports of the US pressuring India to sign the CTBT and fresh efforts by the Obama administration to revive non-proliferation activism.

Santhanam, a former official with the Defence Research and Development Organisation, said that the thermonuclear or hydrogen bomb tests - the first and most powerful of the three tests conducted on May 11, 1998 - did not produce the desired yield.