The National Investigation Agency handed over some more documents, including DNA reports and call details of the four terrorists killed in the attack, to the JIT.
Senior Punjab Police officer Salwinder Singh on Tuesday underwent a lie-detector test in connection with NIA's probe in the terror strike at Pathankot IAF base.
"They had AK-47 guns and they threatened to shoot us...They were speaking in Urdu, Hindi," said the police officer, who was interrogated for about six hours by the National Investigation Agency on Monday.
Even as the anti-terror operations continue at the Pathankot Air Force base, the National Investigation Agency has started piecing together the puzzle over how the terrorists managed to sneak into the country and launch the brazen attack.
NIA was on Monday allowed by a special court to conduct a lie-detector test on senior Punjab Police officer Salwinder Singh in connection with the Pathankot terror attack probe.
The terrorists who struck at the Indian Air Force base in Pathankot on Saturday and who are believed to be from Pakistan-based Jaish-e-Mohammad terror outfit may have stationed themselves within the complex since January one itself apparently unnoticed.
The Gurdaspur SP's jeweller friend Rajesh Verma said the militants who had abducted them were in constant touch with a "commander sahib" and called him at regular intervals.