National Investigative Agency (NIA) is not satisfied with Gurdapur Superintendent of Police Salwinder Singh’s responses following extensive interrogation, said an official of Ministry of Home Affairs. The interrogation of the top cop is likely to conclude today, the official added. Singh reached the NIA office for the second consecutive day today for questioning in connection with the Pathankot terror attack.The NIA had yesterday questioned the top cop at its headquarters in New Delhi. Singh had been summoned by the NIA on Friday to appear before it for detailed interrogation. The Home Ministry in a statement yesterday said that Salwinder’s jeweller friend Rajesh Verma and cook Madan Gopal have also been questioned and would be called again for questioning, if needed.<!– /11440465/Dna_Article_Middle_300x250_BTF –>”The NIA teams have continued to question SP Salwinder Singh’s friend Rajesh Verma as well as his cook Madan Gopal in Punjab. Madan Gopal will be called for questioning at the NIA headquarters in Delhi and the date of his questioning will be intimated in due course,” it added.Seven security personnel died in the attack of the IAF base in Pathankot, located 250 km from Chandigarh, by terrorists suspected from Pakistan.