Zakariya, who was lodged in Presidency jail in Kolkata, was produced before Chief Metropolitan Magistrate Amit Bansal in pursuance to the production warrants issued against him earlier.
Seeking custodial interrogation of Zakariya, who is Tunda's father-in-law, the Special Cell of Delhi Police told the court that in 1994 when Tunda had gone to Pakistan, Zakariya had helped him illegally enter Bangladesh.
Zakariya, who was arrested by West Bengal police in some other case, is accused of helping Pakistani nationals to infiltrate into India and Tunda is also in police custody in this case.
Detailing Zakariya's role, the police said he had also helped some Pakistani nationals to infiltrate into India for carrying out various terror strikes which occurred in and around Delhi in 1998.
Police also sought Zakariya's custodial interrogation to confront him with other accused, Mohd Basiruddin and Allauddin. Police said he will be taken to the places from where he helped Pakistani nationals infiltrate into India.