A team of NIA officials recorded the statement of his wives in Kupwara while the family members of Mir were contacted in Bandipore, both areas in North Kashmir, sources said.
They said the NIA also talked to and recorded the versions of the local 'sarpanches' of these areas with regard to its probe tracking the circumstances of the arrest of Shah by Delhi police which accused him of being a terrorist who was planning a 'fidayeen' attack ahead of Holi in Delhi.
With Delhi and Jammu and Kashmir police divided on circumstances leading to Shah's arrest, the Centre had recently transferred the probe into the case to NIA.
While Delhi police has claimed that with Shah's arrest they had foiled a 'fidayeen' (suicide) attack in the national capital ahead of Holi, its J-K counterpart insisted he was one of those who had exfiltrated in 1990s and had returned to India to surrender under the state's rehabilitation policy.
45-year-old Shah, a resident of Jammu and Kashmir, has been quizzed by special cell of Delhi police since March 21.