Pakistani-American terrorist David Coleman Headley's interrogation has pointed to links between official establishments and militants, which are growing "stronger", National Security Adviser, (NSA) Mr Shivshankar Menon, said on Tuesday.
Without naming Pakistan, the NSA said the nexus has left no room for India to be optimistic.
"Headley's interrogation has revealed militant link with official establishments and the nexus with existing agencies is making it difficult...," Mr Menon said while addressing a conference on terrorism here.