Suspected ISI agent Mohammad Aijaz, who was arrested from Meerut last month, broke down following a telephonic conversation with his family in Pakistan, reports said.
Aijaz, who hails from Taramadi Chowk in Islamabad's Irfanabad area, was nabbed by a team of Special Task Force personnel at Cantt railway station in Meerut on 27 November.
The six-minute call, which was made in order to establish the identity of the Pakistani agent, was recorded by the police.
The accused, who broke down after speaking to his mother Irshad Begum, also spoke to his sisters Shabnam, Shahzad and Shijida on the phone number of his brother Hadad alias Prince, PTI reported.
During interrogation, he had earlier told the police that the ISI did not fulfil promises to take care of his family and getting his sisters married.
After informing his relatives about the arrest by Indian security agencies, Aijaz comforted them saying he "was fine and return to his country soon."
The Special Task Force team had recovered secret documents related to the Indian Army along with a fake voter ID, a fake Aadhaar card and Delhi Metro card.
The police disclosed that the accused was very cunning and trying to mislead the investigation, said reports. They are also looking into possible partners of Aijaz in India.