The NIA, which took over the case immediately after terrorists struck inside the IAF base during the intervening night of January 1 and 2, had summoned Singh as he was kidnapped by terrorists during the New Year night before they entered into the air base.
Singh, who is at present a Superintendent of Police rank officer posted as Assistant Commandant of 75th battalion of Punjab Armed Police after he was removed as SP (headquarters) Gurdaspur, had allegedly given contradictory statements about his kidnapping and sequences of events preceding and succeeding the hostage event, official sources said.
The NIA has recorded statement of the caretaker of the shrine which Singh had said that he had visited with Gopal and his jeweller friend Rajesh Verma, who was left bleeding with a cut below his throat by the terrorists after abducting the other two.
The caretaker, who is related to the cook, had told the sleuths that Gopal and Verma had come in the morning of December 31 and again in the evening and he was not aware of the reason for his visit to the shrine twice, official sources said.
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Meanwhile, a Home Ministry spokesperson said NIA has moved to secure a Black Notice from Interpol (used to identify unidentified bodies) to ascertain identity of four bodies of terrorists who attacked Pathankot air base.
The NIA has also sent some body parts to CFSL to ascertain whether they belong to the remaining two terrorists who were involved in the 80-hour long gun battle with security forces which left seven personnel dead, the sources said.
NIA teams are working across Punjab and are examining witnesses and carrying out search operations at the encounter site as well as outside the base, he said.