Intelligence officials say ISI operatives are using call spoofing software to make the calls. These numbers start as 2301 or 2309 to indicate the calls are from some government office at Raisina Hill.
On February 21, immediately after the Dilsukhnagar blasts in Hyderabad, a person claiming to be Major Ajay Sharma from ‘MI-3’ had contacted the NSG headquarters.
The calls were further directed to the NSG office in Hyderabad. During the call, the officer on duty had given away some details about the deployment of the NSG team from Hyderabad at the blast site. Sources say an ISI official by the name of Mohammad Tasleem was behind the incident.