During an in-camera proceeding, Special NIA Judge Amar Nath, remanded the 12 accused to 11-day police custody after the agency submitted that their custodial interrogation was needed to unearth the conspiracy of ISIS to spread its reach in India.
The accused's faces were muffled when they were produced in the court amid tight security.
"During their preliminary interrogation, all the accused persons have disclosed many facts about their involvement in this case about recruiting and financing persons, willing to join the caliphate of ISIS at Syria," it said.
According to the sources, the probe agency informed the court that the accused were arrested for allegedly planning to carry out attacks ahead of the Republic Day.
Advocate M S Khan, who appeared for 10 of the 12 arrested accused, opposed the NIA's plea contending that the FIR has been lodged by the agency merely on suspicion and no terror act was carried out by any of them.
NIA, in its remand application, said the accused were
The agency also claimed that the accused were involved in conspiring and planning with their other associates and handlers of ISIS to motivate and lure Indian youths to join the internationally proscribed terror outfit in furtherance of activities of its ideologies. The identity and role of such associates is being ascertained, it said.
"The electronic items seized from the accused and their family members includes laptop, external hard disk, mobile phones and SIMs etc. These items are likely to be forwarded to CERT-In for forensic analysis.
Opposing the contentions, Khan argued in the court that NIA could procure the records of the alleged internet chats from the service providers and this cannot be a ground to send his clients to NIA custody.
He also claimed that his clients were implicated in the case merely on the basis of suspicion.
NIA said these accused were arrested from various places including Bangalore, Hyderabad, Mumbai and Aurangabad, were produced in the respective courts and brought to Delhi on transit remand.
NIA and other central agencies have arrested 14 people, including these 12, on Friday and Saturday for allegedly planning to carry out attacks ahead of the Republic Day.
They were arrested under several sections including Unlawful Activities (Prevention) Act and the IPC. A case was registered by the NIA on December 9, 2015, against unknown and unidentified persons involved in the activities of Islamic State (IS) in India and Asian Powers in peace with India.
