Ahead of the visit of Pakistani Special Investigating Team, likely to take place in the last week of this month, the NIA sent the Letters Rogatory, a legal document sent through the special court asking details about the phone numbers dialled by the four terrorists.
The move comes barely a few days before the Special Investigation Team of Pakistan visits here to ascertain the facts of the case and investigation carried out by the NIA.
National Investigation Agency officials said that Salvinder Singh, his jeweller friend Rajesh Verma and cook Madan Gopal have been summoned for a routine questioning as the agency is preparing to receive a five-member Special Investigation Team from Pakistan on March 27.
India plans to provide the probe team from Pakistan access to all witnesses in the Pathankot terror attack case but not security personnel from the National Security Guard or the Border Security Force.
